2022/09/12 更新

写真a

チョウ チードン
周 啓東
ZHOU Qidong
所属
高等研究院 特任助教
素粒子宇宙起源研究所 特任助教
職名
特任助教
連絡先
メールアドレス
外部リンク

学位 1

  1. 博士(理学) ( 2018年3月 ) 

研究キーワード 4

  1. 新物理探査

  2. 素粒子実験

  3. Trigger/DAQ

  4. 宇宙線

研究分野 1

  1. 自然科学一般 / 素粒子、原子核、宇宙線、宇宙物理にする実験

現在の研究課題とSDGs 1

  1. タウレプトンを伴うB中間子崩壊の精密測定による新物理の探査

経歴 4

  1. 名古屋大学   高等研究院/素粒子宇宙起源研究所   特任助教

    2020年4月

  2. 高エネルギー加速器研究機構   素粒子原子核研究所   研究員

    2018年11月 - 2020年3月

  3. 高エネルギー加速器研究機構   素粒子原子核研究所   研究員

    2018年7月 - 2018年10月

  4. 名古屋大学   宇宙地球環境研究所   研究員

    2018年4月 - 2018年6月

学歴 2

  1. 名古屋大学   理学研究科

    2015年4月 - 2018年3月

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    備考: 素粒子宇宙物理学専攻

  2. 名古屋大学   理学研究科

    2013年4月 - 2015年3月

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    備考: 素粒子宇宙物理学専攻

所属学協会 3

  1. 高エネルギー物理学研究者会議

    2021年4月 - 現在

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  2. 日本物理学会

  3. 日本宇宙線研究者会議

受賞 2

  1. 宇宙線研究者会議 宇宙線物理学奨励賞

    2019年3月   宇宙線研究者会議  

  2. 日本物理学会 第13回日本物理学会若手奨励賞

    2019年3月   日本物理学会  

 

論文 21

  1. Precise Measurement of the D-0 and D+ Lifetimes at Belle II

    Abudinen F., Adachi I, Adamczyk K., Aggarwal L., Ahmed H., Aihara H., Akopov N., Aloisio A., Ky N. Anh, Asner D. M., Atmacan H., Aushev V, Babu V, Bacher S., Bae H., Baehr S., Bahinipati S., Bambade P., Banerjee Sw, Bansal S., Barrett M., Baudot J., Bauer M., Baur A., Becker J., Behera P. K., Bennett J. V, Bernieri E., Bernlochner F. U., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhardwaj V, Bianchi F., Bilka T., Bilokin S., Biswas D., Bobrov A., Bodrov D., Bolz A., Bozek A., Bracko M., Branchini P., Braun N., Briere R. A., Browder T. E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Chang M-C, Chang P., Cheaib R., Chekelian V, Chen C., Chen Y-T, Cheon B. G., Chilikin K., Chirapatpimol K., Cho H-E, Cho K., Cho S-J, Choi S-K, Choudhury S., Cinabro D., Corona L., Cremaldi L. M., Cunliffe S., Czank T., Dattola F., De la Cruz-Burelo E., de Marino G., De Nardo G., De Pietro G., de Sangro R., Destefanis M., Dey S., De Yta-Hernandez A., Di Canto A., Di Capua F., Dingfelder J., Dolezal Z., Dominguez Jimenez I, Dong T. V, Dorigo M., Dort K., Dossett D., Dubey S., Duell S., Dujany G., Ecker P., Epifanov D., Ferber T., Ferlewicz D., Finocchiaro G., Flood K., Fodor A., Forti F., Fulsom B. G., Gabrielli A., Gabyshev N., Gaz A., Gellrich A., Giakoustidis G., Giordano R., Giri A., Glazov A., Gobbo B., Godang R., Goldenzweig P., Golob B., Gradl W., Graziani E., Greenwald D., Gu T., Guan Y., Gudkova K., Guilliams J., Hadjivasiliou C., Halder S., Hara K., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hazra S., Hearty C., Heredia de la Cruz I, Villanueva M. Hernandez, Hershenhorn A., Higuchi T., Hill E. C., Hirata H., Hoek M., Hohmann M., Hsu C-L, Humair T., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jaffe D. E., Jang E-J, Jia S., Jin Y., Junkerkalefeld H., Kakuno H., Kaliyar A. B., Kandra J., Kang K. H., Karl R., Karyan G., Kato Y., Kawasaki T., Kiesling C., Kim C-H, Kim D. Y., Kim Y-K, Kim Y., Kimmel T. D., Kinoshita K., Kodys P., Koga T., Kohani S., Konno T., Korpar S., Kovalenko E., Kowalewski R., Kraetzschmar T. M. G., Krinner F., Krizan P., Krokovny P., Kuhr T., Kumar J., Kumar M., Kumar R., Kumara K., Kurz S., Kuzmin A., Kwon Y-J, Lacaprara S., Lalwani K., Lam T., Lanceri L., Lange J. S., Laurenza M., Lautenbach K., Le Diberder F. R., Lee S. C., Leitl P., Levit D., Li C., Li L. K., Libby J., Lieret K., Liptak Z., Liu Q. Y., Liventsev D., Longo S., Lueck T., Lyu C., Manfredi R., Manoni E., Marinas C., Martini A., Matsuda T., Matsuoka K., Matvienko D., McKenna J. A., Meier F., Merola M., Metzner F., Miller C., Miyabayashi K., Mizuk R., Mohanty G. B., Molina-Gonzalez N., Moon H., Moser H-G, Mrvar M., Murphy C., Mussa R., Nakamura I, Nakamura K. R., Nakao M., Nakazawa H., Natkaniec Z., Natochii A., Nazaryan G., Niebuhr C., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Onishchuk Y., Ono H., Onuki Y., Oskin P., Oxford E. R., Ozaki H., Pakhlov P., Paladino A., Pang T., Panta A., Paoloni E., Pardi S., Park H., Park S-H, Paschen B., Passeri A., Pathak A., Patra S., Paul S., Pedlar T. K., Peruzzi I, Peschke R., Pestotnik R., Pham F., Piccolo M., Piilonen L. E., Angioni G. Pinna, Podesta-Lerma P. L. M., Podobnik T., Pokharel S., Polat G., Popov V, Praz C., Prell S., Prencipe E., Prim M. T., Purohit M. V, Purwar H., Rad N., Rados P., Raiz S., Reiter S., Remnev M., Ripp-Baudot I, Rizzo G., Rizzuto L. B., Robertson S. H., Roney J. M., Rostomyan A., Rout N., Rozanska M., Sahoo D., Sanders D. A., Sandilya S., Sangal A., Santelj L., Sato Y., Savinov V, Scavino B., Schueler J., Schwanda C., Schwartz A. J., Seino Y., Selce A., Senyo K., Serrano J., Sfienti C., Shiu J-G, Shwartz B., Sibidanov A., Simon F., Sobie R. J., Soffer A., Sokolov A., Solovieva E., Spataro S., Spruck B., Staric M., Stefkova S., Stottler Z. S., Stroili R., Strube J., Sumihama M., Sutcliffe W., Suzuki S. Y., Svidras H., Tabata M., Takizawa M., Tamponi U., Tanaka S., Tanida K., Tanigawa H., Taniguchi N., Tenchini F., Tiwary R., Tonelli D., Torassa E., Toutounji N., Trabelsi K., Tsuboyama T., Ueda I, Uehara S., Uematsu Y., Uglov T., Unger K., Unno Y., Uno K., Uno S., Urquijo P., Ushiroda Y., Usov Y. V, Vahsen S. E., van Tonder R., Varner G. S., Vinokurova A., Vitale L., Vossen A., Waheed E., Wakeling H. M., Wang E., Wang M-Z, Wang X. L., Warburton A., Watanabe M., Welsch M., Wessel C., Wiechczynski J., Won E., Xu X. P., Yabsley B. D., Yamada S., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yoshihara K., Yusa Y., Zani L., Zhilich V, Zhou Q. D., Zhou X. Y., Zhukova V. I, Zlebcik R.

    PHYSICAL REVIEW LETTERS   127 巻 ( 21 ) 頁: 211801   2021年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.127.211801

    Web of Science

    PubMed

  2. Search for B+ -> K+nu(nu)over-bar Decays Using an Inclusive Tagging Method at Belle H

    Abudinen F., Adachi I, Adamczyk K., Ahlburg P., Aihara H., Akopov N., Aloisio A., Ky N. Anh, Asner D. M., Atmacan H., Aushev T., Aushev V, Baur A., Babu V, Baehr S., Bambade P., Banerjee Sw, Bansal S., Baudot J., Becker J., Behera P. K., Bennett J. V, Bernieri E., Bernlochner F. U., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bianchi F., Bilka T., Biswas D., Bozek A., Bracko M., Branchini P., Braun N., Browder T. E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cervenkov D., Chang P., Cheaib R., Chekelian V, Chen C., Chen Y-T, Cheon B. G., Chilikin K., Chirapatpimol K., Cho K., Cho S-J, Choudhury S., Cinabro D., Corona L., Cremaldi L. M., Cunliffe S., Czank T., Dattola F., De La Cruz-Burelo E., de Marino G., De Nardo G., De Nuccio M., De Pietro G., de Sangro R., Destefanis M., Dey S., De Yta-Hernandez A., Di Canto A., Di Capua F., Dingfelder J., Dolezal Z., Dominguez Jimenez I, Dong T. V, Dort K., Dubey S., Duell S., Dujany G., Eidelman S., Eliachevitch M., Epifanov D., Ferber T., Ferlewicz D., Fillinger T., Finocchiaro G., Fiore S., Fodor A., Forti F., Frey A., Fulsom B. G., Gabyshev N., Ganiev E., Garcia-Hernandez M., Garmash A., Gaur V, Gaz A., Gellrich A., Giordano R., Giri A., Glazov A., Gobbo B., Godang R., Goldenzweig P., Golob B., Grace P., Gradl W., Graziani E., Greenwald D., Guan Y., Gudkova K., Hadjivasiliou C., Halder S., Hara K., Hartbrich O., Hayasaka K., Hayashii H., Hazra S., Hearty C., Heredia de la Cruz I, Hernandez Villanueva M., Hershenhorn A., Higuchi T., Hill E. C., Hirata H., Hoek M., Hohmann M., Hsu C-L, Humair T., Iijima T., Inami K., Inguglia G., Jabbar J. Irakkathil, Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jackson P., Jacobs W. W., Jaffe D. E., Jin Y., Joo C., Junkerkalefeld H., Kaliyar A. B., Kandra J., Kang K. H., Karl R., Karyan G., Kawasaki T., Ketter C., Kichimi H., Kiesling C., Kim C-H, Kim D. Y., Kim Y-K, Kimmel T. D., Kodys P., Koga T., Kohani S., Konno T., Korobov A., Korpar S., Kovalenko E., Kraetzschmar T. M. G., Krinner F., Krizan P., Krokovny P., Kuhr T., Kumar J., Kumar M., Kumar R., Kumara K., Kunigo T., Kurz S., Kuzmin A., Kwon Y-J, Lacaprara S., Lai Y-T, La Licata C., Lanceri L., Lange J. S., Laurenza M., Lautenbach K., Le Diberder F. R., Lee S. C., Leitl P., Levit D., Lewis P. M., Li C., Li L. K., Li S. X., Li Y. B., Libby J., Lieret K., Liptak Z., Liu Q. Y., Liventsev D., Longo S., Lozar A., Lueck T., Lyu C., Maggiora M., Maity S., Manfredi R., Manoni E., Marcello S., Marinas C., Martini A., Masuda M., Matsuda T., Matsuoka K., Matvienko D., Meier F., Merola M., Metzner F., Milesi M., Miller C., Miyabayashi K., Miyake H., Mizuk R., Mohanty G. B., Moser H-G, Mrvar M., Muller F. J., Murphy C., Mussa R., Nakamura K. R., Nakao M., Natkaniec Z., Natochii A., Nayak M., Nazaryan G., Niebuhr C., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Onishchuk Y., Ono H., Onuki Y., Oskin P., Ozaki H., Pakhlov P., Pakhlova G., Paladino A., Pang T., Panta A., Paoloni E., Pardi S., Park H., Park S-H, Paschen B., Passeri A., Pathak A., Patra S., Paul S., Pedlar T. K., Peruzzi I, Pestotnik R., Piccolo M., Piilonen L. E., Podesta-Lerma P. L. M., Podobnik T., Pokharel S., Polat G., Popov V, Praz C., Prell S., Prencipe E., Prim M. T., Rad N., Rados P., Raiz S., Remnev M., Ripp-Baudot I, Ritter M., Rizzo G., Rizzuto L. B., Robertson S. H., Rodriguez Perez D., Roney J. M., Rostomyan A., Rout N., Russo G., Sahoo D., Sanders D. A., Sandilya S., Sangal A., Santelj L., Sato Y., Savinov V, Scavino B., Schueler J., Schwanda C., Schwartz A. J., Seddon R. M., Seino Y., Selce A., Senyo K., Serrano J., Sevior M. E., Sfienti C., Shiu J-G, Shwartz B., Sibidanov A., Simon F., Sobie R. J., Soffer A., Sokolov A., Solovieva E., Spataro S., Spruck B., Stefkova S., Stottler Z. S., Stroili R., Sumihama M., Sumisawa K., Summers D. J., Sutcliffe W., Suzuki S. Y., Svidras H., Tabata M., Takahashi M., Takizawa M., Tamponi U., Tanaka S., Tanida K., Tanigawa H., Taniguchi N., Taras P., Tenchini F., Tonelli D., Torassa E., Toutounji N., Trabelsi K., Uchida M., Unno Y., Uno K., Uno S., Urquijo P., Ushiroda Y., Usov Y. V, Vahsen S. E., van Tonder R., Varner G. S., Varvell K. E., Vinokurova A., Vitale L., Wach B., Waheed E., Wakeling H. M., Abdullah W. Wan, Wang M-Z, Wang X. L., Warburton A., Watanuki S., Webb J., Welsch M., Wessel C., Wiechczynski J., Windel H., Xu X. P., Yabsley B. D., Yamada S., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yook Y. M., Yoshihara K., Yuan C. Z., Yusa Y., Zani L., Zhilich V, Zhou Q. D., Zhou X. Y., Zhukova V. I

    PHYSICAL REVIEW LETTERS   127 巻 ( 18 ) 頁: 181802   2021年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.127.181802

    Web of Science

    PubMed

  3. Performance of the Unified Readout System of Belle II

    Nakao Mikihiko, Itoh Ryosuke, Yamada Satoru, Suzuki Soh Y., Konno Tomoyuki, Zhou Qi-Dong, Kunigo Takuto, Sugiura Ryohei, Park Seokhee, Liu Zhen-An, Zhao Jingzhou, Konorov Igor, Levit Dmytro, Nakamura Katsuro, Tanigawa Hikaru, Taniguchi Nanae, Uchida Tomohisa, Nishimura Kurtis, Hartbrich Oskar, Lai Yun-Tsung, Shoji Masayoshi, Kuzmin Alexander, Zhulanov Vladimir, Kunkler Brandon, Mostafanezhad Isar, Nakazawa Hideyuki, Unno Yuji

    IEEE TRANSACTIONS ON NUCLEAR SCIENCE   68 巻 ( 8 ) 頁: 1826 - 1832   2021年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1109/TNS.2021.3084826

    Web of Science

  4. Study of contributions of diffractive processes to forward neutral particle production with the ATLAS-LHCf detector

    Zhou Qi-Dong

    XX INTERNATIONAL SYMPOSIUM ON VERY HIGH ENERGY COSMIC RAY INTERACTIONS (ISVHECRI 2018)   208 巻   2019年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1051/epjconf/201920805008

    Web of Science

  5. B-flavor tagging at Belle II 査読有り

    Abudinen F., Akopov N., Aloisio A., Babu V, Banerjee Sw, Bauer M., Bennett J. V, Bernlochner F. U., Bessner M., Bettarini S., Bilka T., Bilokin S., Biswas D., Bodrov D., Borah J., Bracko M., Branchini P., Budano A., Campajola M., Casarosa G., Cecchi C., Cheaib R., Chekelian V, Chen C., Chen Y. Q., Cho H-E, Cunliffe S., De Nardo G., De Pietro G., de Sangro R., Dey S., Di Canto A., Di Capua F., Dong T. V, Dujany G., Ecker P., Eliachevitch M., Ferber T., Forti F., Ganiev E., Gaz A., Gelb M., Gemmler J., Godang R., Goldenzweig P., Graziani E., Hara K., Hershenhorn A., Higuchi T., Hill E. C., Hohmann M., Humair T., Inguglia G., Junkerkalefeld H., Karl R., Kato Y., Keck T., Kiesling C., Kim C-H, Kohani S., Komarov I, Kraetzschmar T. M. G., Krizan P., Krohn J. F., Kuhr T., Kumar J., Kumara K., Kurz S., Lacaprara S., La Licata C., Laurenza M., Lautenbach K., Lee S. C., Lieret K., Li Gioi L., Liu Q. Y., Longo S., Maggiora M., Manoni E., Marinas C., Martini A., Meier F., Merola M., Metzner F., Milesi M., Miyabayashi K., Mohanty G. B., Mueller F., Murphy C., Oxford E. R., Park S-H, Passeri A., Pham F., Piilonen L. E., Pokharel S., Prim M. T., Pulvermacher C., Rados P., Ritter M., Rostomyan A., Sandilya S., Santelj L., Sato Y., Schwartz A. J., Sevior M. E., Soffer A., Spataro S., Stroili R., Sutcliffe W., Tagnani D., Takizawa M., Tamponi U., Tenchini F., Torassa E., Urquijo P., Vitale L., Yusa Y., Zani L., Zhou Q. D., Zlebcik R., Zupanc A.

    EUROPEAN PHYSICAL JOURNAL C   82 巻 ( 4 )   2022年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1140/epjc/s10052-022-10180-9

    Web of Science

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    その他リンク: https://link.springer.com/article/10.1140/epjc/s10052-022-10180-9/fulltext.html

  6. Combined analysis of Belle and Belle II data to determine the CKM angle phi(3) using B+ -> D(K(S)(0)h(+)h(-))h(+) decays

    Abudinen F., Aggarwal L., Ahmed H., Aihara H., Akopov N., Al Said S., Aloisio A., Ky N. Anh, Asner D. M., Atmacan H., Aushev V, Ayad R., Babu V, Bacher S., Baehr S., Bahinipati S., Bambade P., Banerjee Sw, Bansal S., Baudot J., Becker J., Behera P. K., Belous K., Bennett J. V, Bernlochner F. U., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bianchi F., Bilka T., Biswas D., Bobrov A., Bodrov D., Bonvicini G., Borah J., Bozek A., BraCko M., Branchini P., Briere R. A., Browder T. E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cervenkov D., Cheema P., Chekelian V, Chen A., Cheon B. G., Chilikin K., Chirapatpimol K., Cho H-E, Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Corona L., Cunliffe S., Czank T., Das S., Dattola F., De La Cruz-Burelo E., de Marino G., Maurya S. K., De Nardo G., De Nuccio M., De Pietro G., de Sangro R., Destefanis M., Dey S., De Yta-Hernandez A., Dhamija R., Di Canto A., Dolezal Z., Dominguez Jimenez I, Dong T. V, Dorigo M., Dossett D., Dubey S., Dujany G., Eliachevitch M., Epifanov D., Feichtinger P., Ferlewicz D., Fillinger T., Fiore S., Fodor A., Forti F., Fulsom B. G., Gabrielli A., Ganiev E., Garcia-Hernandez M., Gaur V, Gaz A., Giordano R., Giri A., Glazov A., Godang R., Goldenzweig P., Golob B., Gradl W., Graziani E., Greenwald D., Gu T., Guan Y., Gudkova K., Guilliams J., Hadjivasiliou C., Halder S., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hazra S., Heredia de la Cruz I, Hershenhorn A., Higuchi T., Hill E. C., Hou W-S, Hsu C-L, Iijima T., Inami K., Ishikawa A., Iwasaki M., Jacobs W. W., Jang E-J, Jin Y., Junkerkalefeld H., Kaliyar A. B., Kang K. H., Karl R., Karyan G., Kato Y., Ketter C., Kiesling C., Kim C-H, Kim D. Y., Kim K-H, Kim Y-K, Kinoshita K., Kodys P., Koga T., Kohani S., Korpar S., Kovalenko E., Kraetzschmar T. M. G., Krizan P., Krokovny P., Kuhr T., Kumar J., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lacaprara S., Lai Y-T, La Licata C., Lanceri L., Lange J. S., Leboucher R., Lee S. C., Leitl P., Li J., Li S. X., Li Gioi L., Libby J., Lieret K., Liptak Z., Liu Q. Y., Liventsev D., Longo S., Lueck T., Lyu C., Maggiora M., Maiti R., Maity S., Manfredi R., Manoni E., Marcello S., Martini A., Massaccesi L., Masuda M., Matsuoka K., Matvienko D., McKenna J. A., Meier F., Merola M., Metzner F., Milesi M., Miller C., Miyabayashi K., Mizuk R., Mohanty G. B., Molina-Gonzalez N., Moser H-G, Mueller F., Murphy C., Mussa R., Nakamura K. R., Nakano T., Nakao M., Naruki M., Narwal D., Natochii A., Nayak L., Nayak M., Nazaryan G., Nisar N. K., Nishida S., Nishimura K., Onishchuk Y., Ono H., Oskin P., Pakhlova G., Paladino A., Panta A., Paoloni E., Parham K., Park S-H, Passeri A., Pathak A., Patra S., Pestotnik R., Piilonen L. E., Podobnik T., Pokharel S., Polat L., Praz C., Prell S., Prencipe E., Prim M. T., Purwar H., Rabusov A., Rados P., Raiz S., Reiter S., Remnev M., Ripp-Baudot I, Rizzo G., Rizzuto L. B., Robertson S. H., Rohrken M., Roney J. M., Rostomyan A., Rout N., Sahoo D., Sanders D. A., Sandilya S., Santelj L., Sato Y., Savinov V, Scavino B., Schnell G., Schueler J., Schwartz A. J., Seino Y., Selce A., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shillington T., Shwartz B., Sibidanov A., Simon F., Singh J. B., Soffer A., Solovieva E., Spataro S., Spruck B., Stefkova S., Stottler Z. S., Stroili R., Sumisawa K., Sutcliffe W., Suzuki S. Y., Tabata M., Takizawa M., Tanida K., Tenchini F., Tiwary R., Tonelli D., Torassa E., Trabelsi K., Uchida M., Ueda I, Uglov T., Uno K., Uno S., Ushiroda Y., Vahsen S. E., van Tonder R., Varvell K. E., Vinokurova A., Vitale L., Wakeling H. M., Wang E., Wang M-Z, Wang X. L., Warburton A., Watanuki S., Werbycka O., Wessel C., Won E., Yabsley B. D., Yan W., Ye H., Yoshihara K., Yusa Y., Zani L., Zhai Y., Zhang Y., Zhilich V, Zhou Q. D., Zhou X. Y., Zhukova V. I

    JOURNAL OF HIGH ENERGY PHYSICS   ( 2 )   2022年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1007/JHEP02(2022)063

    Web of Science

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  7. PCI-Express Based High-Speed Readout for the Belle II DAQ Upgrade 査読有り

    Zhou Q. D., Yamada S., Robbe P., Charlet D., Itoh R., Nakao M., Suzuki S. Y., Kunigo T., Jules E., Plaige E., Taurigna M., Purwar H., Hartbrich O., Bessner M., Nishimura K., Varner G., Lai Y-T, Higuchi T., Sugiura R., Biswas D., Kapusta P.

    IEEE TRANSACTIONS ON NUCLEAR SCIENCE   68 巻 ( 8 ) 頁: 1818 - 1825   2021年8月

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    担当区分:筆頭著者, 責任著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1109/TNS.2021.3086526

    Web of Science

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  8. Search for Axionlike Particles Produced in e(+)e(-) Collisions at Belle II

    Abudinen F., Adachi I, Aihara H., Akopov N., Aloisio A., Ameli F., Anh Ky N., Asner D. M., Aushev T., Aushev V, Babu V, Baehr S., Bahinipati S., Bambade P., Banerjee Sw, Bansal S., Baudot J., Becker J., Behera P. K., Bennett J. V, Bernieri E., Bernlochner F. U., Bertemes M., Bessner M., Bettarini S., Bhardwaj V, Bianchi F., Bilka T., Bilokin S., Biswas D., Branchini P., Braun N., Browder T. E., Budano A., Bussino S., Campajola M., Casarosa G., Cecchi C., Cervenkov D., Chang M-C, Chang P., Cheaib R., Chekelian V, Cheon B. G., Chilikin K., Chirapatpimol K., Cho H-E, Cho K., Cho S-J, Choi S-K, Cinabro D., Corona L., Cremaldi L. M., Cunliffe S., Dash N., Dattola F., De La Cruz-Burelo E., De Nardo G., De Nuccio M., De Pietro G., de Sangro R., Destefanis M., De Yta-Hernandez A., Di Capua F., Dolezal Z., Dong T. V, Dort K., Dossett D., Dujany G., Eidelman S., Ferber T., Ferlewicz D., Fiore S., Fodor A., Forti F., Fulsom B. G., Ganiev E., Garg R., Garmash A., Gaur V, Gaz A., Gebauer U., Gellrich A., Gessler T., Giordano R., Giri A., Gobbo B., Godang R., Goldenzweig P., Golob B., Gomis P., Gradl W., Graziani E., Greenwald D., Hadjivasiliou C., Halder S., Hartbrich O., Hayasaka K., Hayashii H., Hearty C., Hedges M. T., Heredia de la Cruz I, Villanueva M. Hernandez, Hershenhorn A., Higuchi T., Hill E. C., Hirata H., Hoek M., Hohmann M., Hsu C-L, Hu Y., Inami K., Inguglia G., Jabbar J. Irakkathil, Ishikawa A., Itoh R., Jackson P., Jacobs W. W., Jaffe D. E., Jang E-J, Jia S., Jin Y., Joo C., Kaliyar A. B., Kandra J., Karyan G., Kato Y., Kichimi H., Kiesling C., Kim C-H, Kim D. Y., Kim H. J., Kim S-H, Kim Y-K, Kimmel T. D., Kinoshita K., Kleinwort C., Kodys P., Koga T., Kohani S., Komarov I, Korpar S., Kraetzschmar T. M. G., Krizan P., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kurz S., Kwon Y-J, Lacaprara S., La Licata C., Lanceri L., Lange J. S., Lee I-S, Lee S. C., Leitl P., Levit D., Lewis P. M., Li C., Li L. K., Li Y. B., Libby J., Lieret K., Li Gioi L., Liptak Z., Liu Q. Y., Liventsev D., Longo S., Luo T., MacQueen C., Maeda Y., Manfredi R., Manoni E., Marcello S., Marinas C., Martini A., Masuda M., Matsuoka K., Matvienko D., Meggendorfer F., Meier F., Merola M., Metzner F., Milesi M., Miller C., Miyabayashi K., Mizuk R., Azmi K., Mohanty G. B., Moser H-G, Mrvar M., Mueller F. J., Mussa R., Nakamura I, Nakao M., Nakazawa H., Natochii A., Niebuhr C., Nisar N. K., Nishida S., Nouxman M. H. A., Ogawa K., Ogawa S., Ono H., Oskin P., Ozaki H., Pakhlov P., Paladino A., Panta A., Paoloni E., Pardi S., Park H., Park S-H, Paschen B., Passeri A., Pathak A., Patra S., Paul S., Pedlar T. K., Peruzzi I, Peschke R., Piccolo M., Piilonen L. E., Polat G., Popov V, Praz C., Prencipe E., Prim M. T., Purohit M. V, Rad N., Rados P., Rasheed R., Reif M., Reiter S., Remnev M., Ripp-Baudot I, Ritter M., Ritzert M., Rizzo G., Robertson S. H., Rodriguez Perez D., Roney J. M., Rosenfeld C., Rostomyan A., Rout N., Sahoo D., Sakai Y., Sanders D. A., Sandilya S., Sangal A., Santelj L., Sato Y., Savinov V, Scavino B., Schwanda C., Schwartz A. J., Seddon R. M., Seino Y., Selce A., Senyo K., Serrano J., Sevior M. E., Sfienti C., Shiu J-G, Sibidanov A., Simon F., Sobie R. J., Soffer A., Solovieva E., Spataro S., Spruck B., Staric M., Stefkova S., Stottler Z. S., Stroili R., Strube J., Sumihama M., Sumiyoshi T., Summers D. J., Sutcliffe W., Svidras H., Tabata M., Takizawa M., Tamponi U., Tanaka S., Tanida K., Tanigawa H., Taras P., Tenchini F., Tonelli D., Torassa E., Trabelsi K., Uchida M., Uglov T., Unger K., Unno Y., Uno S., Urquijo P., Ushiroda Y., Vahsen S. E., van Tonder R., Varner G. S., Varvell K. E., Vinokurova A., Vitale L., Waheed E., Wakai M., Wakeling H. M., Wang C. H., Wang M-Z, Wang X. L., Warburton A., Watanabe M., Watanuki S., Webb J., Wehle S., Welsch M., Wessel C., Wiechczynski J., Windel H., Won E., Wu L. J., Xu X. P., Yabsley B., Yan W., Yang S. B., Ye H., Yonenaga M., Yuan C. Z., Yusa Y., Zani L., Zhou Q. D., Zhukova V. I

    PHYSICAL REVIEW LETTERS   125 巻 ( 16 )   2020年10月

  9. A DAQ Upgrade Solution for Belle II Experiment

    Liu Zhen'An, Tao Jia, Zhao Jingzhou, Kou Hanjun, Cao Pengcheng, Song Jianing, Gong Wenxuan, Itoh Ryosuke, Yamada Satoru, Zhou Qidong

    IEEE TRANSACTIONS ON NUCLEAR SCIENCE   67 巻 ( 8 ) 頁: 1904 - 1911   2020年8月

  10. Transverse Single-Spin Asymmetry for Very Forward Neutral Pion Production in Polarized p plus p Collisions at root s=510 GeV

    Kim M. H., Adriani O., Berti E., Bonechi L., D'Alessandro R., Goto Y., Hong B., Itow Y., Kasahara K., Lee J. H., Ljubicic T., Makino Y., Menjo H., Nakagawa I, Ogawa A., Park J. S., Sako T., Sakurai N., Sato K., Seidl R., Tanida K., Torii S., Tricomi A., Ueno M., Zhou Q. D.

    PHYSICAL REVIEW LETTERS   124 巻 ( 25 )   2020年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.124.252501

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  11. Search for an Invisibly Decaying Z ' Boson at Belle II in e(+)e(-) -> mu(+)mu(-) (e(+/-)mu(-/+)) Plus Missing Energy Final States

    Adachi, I, P. Ahlburg, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asper, H. Atmacan, T. Aushev, Aushev, V, T. Aziz, Babu, V, S. Baehr, P. Bambade, Sw Banerjee, Bansal, V, M. Barrett, J. Baudot, J. Becker, P. K. Behera, J. Bennett, E. Bernieri, F. U. Bernlochner, M. Bertemes, M. Bessner, S. Bettarini, F. Bianchi, D. Biswas, A. Bozek, M. Bracko, P. Branchini, R. A. Briere, T. E. Browder, A. Budano, L. Burmistrov, S. Bussino, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, D. Cervenkov, M-C Chang, R. Cheaib, Chekelian, V, Y. Q. Chen, Y-T Chen, B. G. Cheon, K. Chilikin, K. Cho, S. Cho, S-K Choi, S. Choudhury, D. Cinabro, L. Corona, L. M. Cremaldi, S. Cunliffe, T. Czank, F. Dattola, E. De La Cruz-Burelo, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, S. Dey, A. De Yta-Hernandez, F. Di Capua, Z. Dolezal, I. Dominguez Jimenez, T. Dong, K. Dort, D. Dossett, S. Dubey, S. Duell, G. Dujany, S. Eidelman, M. Eliachevitch, J. E. Fast, T. Ferber, D. Ferlewicz, G. Finocchiaro, S. Fiore, A. Fodor, F. Forti, B. G. Fulsom, E. Ganiev, M. Garcia-Hernandez, R. Garg, Gaur, V, A. Gaz, A. Gellrich, J. Gemmler, T. Gessler, R. Giordano, A. Giri, B. Gobbo, R. Godang, P. Goldenzweig, B. Golob, P. Gomis, W. Gradl, E. Graziani, D. Greenwald, Y. Guan, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, C. Hearty, M. T. Hedges, Heredia de la Cruz, I, M. Hernandez Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, M. Hoek, C-L Hsu, Y. Hu, T. Iijima, K. Inami, G. Inguglia, J. Irakkathil Jabbar, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, D. E. Jaffe, E-J Jang, H. B. Jeon, S. Jia, Y. Jin, C. Joo, K. K. Joo, J. Kahn, H. Kakuno, A. B. Kaliyar, J. Kandra, G. Karyan, Y. Kato, T. Kawasaki, B. H. Kim, C-H Kim, D. Y. Kim, K-H Kim, S-H Kim, Y. K. Kim, Y. Kim, T. D. Kimmel, H. Kindo, C. Kleinwort, P. Kodys, T. Koga, S. Kohani, Komarov, I, S. Korpar, N. Kovalchuk, T. M. G. Kraetzschmar, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, J. Kumar, M. Kumar, R. Kumar, K. Kumara, S. Kurz, A. Kuzmin, Y-J Kwon, S. Lacaprara, C. La Licata, L. Lanceri, J. S. Lange, K. Lautenbach, I-S Lee, S. C. Lee, P. Leitl, D. Levit, L. K. Li, Y. B. Li, J. Libby, K. Lieret, L. Li Gioi, Z. Liptak, Q. Y. Liu, D. Liventsev, S. Longo, T. Luo, Y. Maeda, M. Maggiora, E. Manoni, S. Marcello, C. Marinas, A. Martini, M. Masuda, T. Matsuda, K. Matsuoka, D. Matvienko, F. Meggendorfer, J. C. Mei, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, H. Miyake, R. Mizuk, K. Azmi, G. B. Mohanty, T. Moon, T. Morii, H-G Moser, F. Mueller, F. J. Mueller, Th Muller, G. Muroyama, R. Mussa, E. Nakano, M. Nakao, M. Nayak, G. Nazaryan, D. Neverov, C. Niebuhr, N. K. Nisar, S. Nishida, K. Nishimura, M. Nishimura, B. Oberhof, K. Ogawa, Y. Onishchuk, H. Ono, Y. Onuki, P. Oskin, H. Ozaki, P. Pakhlov, G. Pakhlova, A. Paladino, A. Panta, E. Paoloni, H. Park, B. Paschen, A. Passeri, A. Pathak, S. Paul, T. K. Pedlar, Peruzzi, I, R. Peschke, R. Pestotnik, M. Piccolo, L. E. Piilonen, Popov, V, C. Praz, E. Prencipe, M. T. Prim, M. Purohit, P. Rados, R. Rasheed, S. Reiter, M. Remnev, P. K. Resmi, Ripp-Baudot, I, M. Ritter, G. Rizzo, L. B. Rizzuto, S. H. Robertson, D. Rodriguez Perez, J. M. Roney, C. Rosenfeld, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, P. Sartori, Y. Sato, Savinov, V, B. Scavino, J. Schueler, C. Schwanda, R. M. Seddon, Y. Seino, A. Selce, K. Senyo, C. Sfienti, C. P. Shen, J-G Shiu, B. Shwartz, A. Sibidanov, F. Simon, R. J. Sobie, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Staric, S. Stefkova, Z. S. Stottler, R. Stroili, J. Strube, M. Sumihama, T. Sumiyoshi, D. J. Summers, S. Y. Suzuki, M. Tabata, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, N. Taniguchi, P. Taras, F. Tenchini, E. Torassa, K. Trabelsi, T. Tsuboyama, M. Uchida, K. Unger, Y. Unno, S. Uno, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, A. Vossen, M. Wakai, H. M. Wakeling, W. Wan Abdullah, C. H. Wang, M-Z Wang, A. Warburton, M. Watanabe, J. Webb, S. Wehle, C. Wessel, J. Wiechczynski, H. Windel, E. Won, B. Yabsley, S. Yamada, W. Yan, S. B. Yang, H. Ye, J. H. Yin, M. Yonenaga, C. Z. Yuan, Y. Yusa, L. Zani, Z. Zhang, Zhilich, V, Q. D. Zhou, X. Y. Zhou, V. Zhukova

    PHYSICAL REVIEW LETTERS   124 巻 ( 14 )   2020年4月

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    出版者・発行元:AMER PHYSICAL SOC  

    Theories beyond the standard model often predict the existence of an additional neutral boson, the Z'. Using data collected by the Belle II experiment during 2018 at the SuperKEKB collider, we perform the first searches for the invisible decay of a Z' in the process e(+)e(-) -> mu(+)mu(-) Z' and of a lepton-flavor-violating Z' in e(+) e(-) -> e(+/-)mu(-/+)Z'. We do not find any excess of events and set 90% credibility level upper limits on the cross sections of these processes. We translate the former, in the framework of an L, - L, theory, into upper limits on the Z' coupling constant at the level of 5 x 10(-2) - 1 for M-z' <= 6 GeV/c(2).

    DOI: 10.1103/PhysRevLett.124.141801

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  12. Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment

    F. Abudinen, Adachi, I, P. Ahlburg, H. Aihara, N. Akopov, A. Aloisio, F. Ameli, L. Andricek, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, Aushev, V, T. Aziz, K. Azmi, Babu, V, S. Baehr, S. Bahinipati, A. M. Bakich, P. Bambade, Sw Banerjee, S. Bansal, Bansal, V, M. Barrett, J. Baudot, A. Beaulieu, J. Becker, P. K. Behera, J. Bennett, E. Bernieri, F. U. Bernlochner, M. Bertemes, M. Bessner, S. Bettarini, Bhardwaj, V, F. Bianchi, T. Bilka, S. Bilokin, D. Biswas, G. Bonvicini, A. Bozek, M. Bracko, P. Branchini, N. Braun, T. E. Browder, A. Budano, S. Bussino, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, D. Cervenkov, M-C Chang, P. Chang, R. Cheaib, Chekelian, V, Y. Q. Chen, Y-T Chen, B. G. Cheon, K. Chilikin, H-E Cho, K. Cho, S. Cho, S-K Choi, S. Choudhury, D. Cinabro, L. Corona, L. M. Cremaldi, S. Cunliffe, T. Czank, F. Dattola, E. De La Cruz-Burelo, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, S. Dey, A. De Yta-Hernandez, F. Di Capua, S. Di Carlo, J. Dingfelder, Z. Dolezal, Dominguez Jimenez, I, T. Dong, K. Dort, S. Dubey, S. Duell, S. Eidelman, M. Eliachevitch, T. Ferber, D. Ferlewicz, G. Finocchiaro, S. Fiore, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, M. Gabriel, E. Ganiev, M. Garcia-Hernandez, R. Garg, A. Garmash, Gaur, V, A. Gaz, U. Gebauer, A. Gellrich, J. Gemmler, T. Gessler, R. Giordano, A. Giri, B. Gobbo, R. Godang, P. Goldenzweig, B. Golob, P. Gomis, P. Grace, W. Gradl, E. Graziani, D. Greenwald, C. Hadjivasiliou, S. Halder, K. Hara, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, C. Hearty, M. T. Hedges, Heredia de la Cruz, I, M. Hernandez Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, H. Hirata, M. Hoek, S. Hollitt, T. Hotta, C-L Hsu, Y. Hu, K. Huang, T. Iijima, K. Inami, G. Inguglia, J. Irakkathil Jabbar, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, S. Iwata, P. Jackson, W. W. Jacobs, D. E. Jaffe, E-J Jang, H. B. Jeon, S. Jia, Y. Jin, C. Joo, J. Kahn, H. Kakuno, A. B. Kaliyar, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, C-H Kim, D. Y. Kim, S-H Kim, Y. K. Kim, Y. Kim, T. D. Kimmel, K. Kinoshita, C. Kleinwort, B. Knysh, P. Kodys, T. Koga, Komarov, I, T. Konno, S. Korpar, D. Kotchetkov, N. Kovalchuk, T. M. G. Kraetzschmar, P. Krizan, R. Kroeger, J. F. Krohn, P. Krokovny, W. Kuehn, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, S. Kurz, A. Kuzmin, Y-J Kwon, S. Lacaprara, Y-T Lai, C. La Licata, K. Lalwani, L. Lanceri, J. S. Lange, K. Lautenbach, I-S Lee, S. C. Lee, P. Leitl, D. Levit, P. M. Lewis, C. Li, L. K. Li, S. X. Li, Y. M. Li, Y. B. Li, J. Libby, K. Lieret, L. Li Gioi, J. Lin, Z. Liptak, Q. Y. Liu, D. Liventsev, S. Longo, A. Loos, F. Luetticke, T. Luo, C. MacQueen, Y. Maeda, M. Maggiora, S. Maity, E. Manoni, S. Marcello, C. Marinas, A. Martini, M. Masuda, K. Matsuoka, D. Matvienko, J. McNeil, J. C. Mei, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, H. Moon, T. Morii, H-G Moser, F. Mueller, F. J. Mueller, Th Muller, R. Mussa, K. R. Nakamura, E. Nakano, M. Nakao, H. Nakayama, H. Nakazawa, M. Nayak, G. Nazaryan, D. Neverov, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, M. Nishimura, M. H. A. Nouxman, B. Oberhof, S. Ogawa, Y. Onishchuk, H. Ono, Y. Onuki, P. Oskin, H. Ozaki, P. Pakhlov, G. Pakhlova, A. Paladino, T. Pang, E. Paoloni, H. Park, S-H Park, B. Paschen, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, Peruzzi, I, R. Peschke, R. Pestotnik, M. Piccolo, L. E. Piilonen, P. L. M. Podesta-Lerma, Popov, V, C. Praz, E. Prencipe, M. T. Prim, M. Purohit, P. Rados, M. Remnev, P. K. Resmi, Ripp-Baudot, I, M. Ritter, M. Ritzert, G. Rizzo, L. B. Rizzuto, S. H. Robertson, D. Rodriguez Perez, J. M. Roney, C. Rosenfeld, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, D. A. Sanders, S. Sandilya, A. Sangal, L. Santelj, P. Sartori, Y. Sato, Savinov, V, B. Scavino, M. Schram, H. Schreeck, J. Schueler, C. Schwanda, A. J. Schwartz, B. Schwenker, R. M. Seddon, Y. Seino, A. Selce, K. Senyo, M. E. Sevior, C. Sfienti, C. P. Shen, H. Shibuya, J-G Shiu, A. Sibidanov, F. Simon, S. Skambraks, R. J. Sobie, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Staric, S. Stefkova, Z. S. Stottler, R. Stroili, J. Strube, M. Sumihama, T. Sumiyoshi, D. J. Summers, W. Sutcliffe, M. Tabata, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, H. Tanigawa, N. Taniguchi, Y. Tao, P. Taras, F. Tenchini, E. Torassa, K. Trabelsi, T. Tsuboyama, N. Tsuzuki, M. Uchida, Ueda, I, S. Uehara, T. Uglov, K. Unger, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, A. Vossen, E. Waheed, H. M. Wakeling, K. Wan, W. Wan Abdullah, B. Wang, M-Z Wang, X. L. Wang, A. Warburton, M. Watanabe, S. Watanuki, J. Webb, S. Wehle, N. Wermes, C. Wessel, J. Wiechczynski, P. Wieduwilt, H. Windel, E. Won, S. Yamada, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, M. Yonenaga, Y. M. Yook, C. Z. Yuan, Y. Yusa, L. Zani, J. Z. Zhang, Z. Zhang, Zhilich, V, Q. D. Zhou, X. Y. Zhou, V. Zhukova, Zhulanov, V, A. Zupanc

    CHINESE PHYSICS C   44 巻 ( 2 )   2020年2月

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    出版者・発行元:IOP PUBLISHING LTD  

    From April to July 2018, a data sample at the peak energy of the resonance was collected with the Belle II detector at the SuperKEKB electron-positron collider. This is the first data sample of the Belle II experiment. Using Bhabha and digamma events, we measure the integrated luminosity of the data sample to be (, where the first uncertainty is statistical and the second is systematic. This work provides a basis for future luminosity measurements at Belle II.

    DOI: 10.1088/1674-1137/44/2/021001

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  13. An upgrade solution for Belle II DAQ system

    Liu Zhen'An, Tao Jia, Zhao Jingzhou, Kou Hanjun, Cao Pengcheng, Song Jianing, Gong Wenxuan, Itoh Ryosuke, Yamada Satoru, Zhou Qidong

    2019 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC)     2019年

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  14. Measurement of inclusive forward neutron production cross section in proton-proton collisions at √s=13 TeV with the LHCf Arm2 detector

    O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D’Alessandro, S. Detti, M. Haguenauer, Y. Itow, K. Kasahara, Y. Makino, K. Masuda, H. Menjo, Y. Muraki, K. Ohashi, P. Papini, S. Ricciarini, T. Sako, N. Sakurai, K. Sato, M. Shinoda, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, M. Ueno, Q. D. Zhou

    Journal of High Energy Physics   2018 巻 ( 11 )   2018年11月

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    © 2018, The Author(s). In this paper, we report the measurement relative to the production of forward neutrons in proton-proton collisions at s=13 TeV obtained using the LHCf Arm2 detector at the Large Hadron Collider. The results for the inclusive differential production cross section are presented as a function of energy in three different pseudorapidity regions: η > 10.76, 8.99 < η < 9.22 and 8.81 < η < 8.99. The analysis was performed using a data set acquired in June 2015 that corresponds to an integrated luminosity of 0.194 nb−1. The measurements were compared with the predictions of several hadronic interaction models used to simulate air showers generated by Ultra High Energy Cosmic Rays. None of these generators showed good agreement with the data for all pseudorapidity intervals. For η > 10.76, no model is able to reproduce the observed peak structure at around 5 TeV and all models underestimate the total production cross section: among them, QGSJET II-04 shows the smallest deficit with respect to data for the whole energy range. For 8.99 < η < 9.22 and 8.81 < η < 8.99, the models having the best overall agreement with data are SIBYLL 2.3 and EPOS-LHC, respectively: in particular, in both regions SIBYLL 2.3 is able to reproduce the observed peak structure at around 1.5–2.5 TeV.[Figure not available: see fulltext.].

    DOI: 10.1007/JHEP11(2018)073

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  15. Measurement of forward photon production cross-section in proton–proton collisions at s=13TeV with the LHCf detector

    O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D'Alessandro, M. Haguenauer, Y. Itow, T. Iwata, K. Kasahara, Y. Makino, K. Masuda, E. Matsubayashi, H. Menjo, Y. Muraki, P. Papini, S. Ricciarini, T. Sako, N. Sakurai, M. Shinoda, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, M. Ueno, Q. D. Zhou

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   780 巻   頁: 233 - 239   2018年5月

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    © 2018 The Author(s) In this paper, we report the production cross-section of forward photons in the pseudorapidity regions of η>10.94 and 8.99>η>8.81, measured by the LHCf experiment with proton–proton collisions at s=13TeV. The results from the analysis of 0.191nb−1 of data obtained in June 2015 are compared to the predictions of several hadronic interaction models that are used in air-shower simulations for ultra-high-energy cosmic rays. Although none of the models agree perfectly with the data, EPOS-LHC shows the best agreement with the experimental data among the models.

    DOI: 10.1016/j.physletb.2017.12.050

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  16. Monte Carlo study of particle production in diffractive proton–proton collisions at √s=13 TeV with the very forward detector combined with central information

    Qi Dong Zhou, Yoshitaka Itow, Hiroaki Menjo, Takashi Sako

    European Physical Journal C   77 巻 ( 4 )   2017年4月

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    出版者・発行元:SPRINGER  

    © 2017, The Author(s). Very forward (VF) detectors in hadron colliders, having unique sensitivity to diffractive processes, can be a powerful tool for studying diffractive dissociation by combining them with central detectors. Several Monte Carlo simulation samples in p–p collisions at s=13 TeV were analyzed, and different nondiffractive and diffractive contributions were clarified through differential cross sections of forward neutral particles. Diffraction selection criteria in the VF-triggered-event samples were determined by using the central track information. The corresponding selection applicable in real experiments has ≈ 100% purity and 30–70% efficiency. Consequently, the central information enables classification of the forward productions into diffraction and nondiffraction categories; in particular, most of the surviving events from the selection belong to low-mass diffraction events at log 10(ξx) < - 5.5. Therefore, the combined method can uniquely access the low-mass diffraction regime experimentally.

    DOI: 10.1140/epjc/s10052-017-4788-7

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  17. Performance study for the photon measurements of the upgraded LHCf calorimeters with Gd<inf>2</inf>SiO<inf>5</inf> (GSO) scintillators

    Y. Makino, A. Tiberio, O. Adriani, E. Berti, L. Bonechi, M. Bongi, Z. Caccia, R. D'Alessandro, M. Del Prete, S. Detti, M. Haguenauer, Y. Itow, T. Iwata, K. Kasahara, K. Masuda, E. Matsubayashi, H. Menjo, G. Mitsuka, Y. Muraki, P. Papini, S. Ricciarini, T. Sako, N. Sakurai, T. Suzuki, T. Tamura, S. Torii, A. Tricomi, W. C. Turner, M. Ueno, Q. D. Zhou

    Journal of Instrumentation   12 巻 ( 3 )   2017年3月

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    © 2017 IOP Publishing Ltd and Sissa Medialab srl. The Large Hadron Collider forward (LHCf) experiment was motivated to understand the hadronic interaction processes relevant to cosmic-ray air shower development. We have developed radiation-hard detectors with the use of Gd2SiO5 (GSO) scintillators for proton-proton √s = 13 TeV collisions. Calibration of such detectors for photon measurement has been completed at the CERN SPS T2-H4 line in 2015 using electron beams of 100-250 GeV and muon beams of 150-250 GeV . After the channel-by-channel absolute energy calibration, the energy resolution of the calorimeters is confirmed to be better than 3% for electrons with energy above 100 GeV . The position dependence of the energy scale of the calorimeters was reduced to the level of 1% after the corrections for scintillator nonuniformity and the shower leakage effect. The position resolution of the new shower imaging detector, a GSO-bar hodoscope interleaved in the calorimeter, was 100 μm for 200 GeV electrons. The experimental results are well explained by Monte Carlo simulations. We have confirmed that the new detectors meet the requirement of the LHCf experiment at √s = 13 TeV.

    DOI: 10.1088/1748-0221/12/03/P03023

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  18. The performance for the TeV photon measurement of the LHCf upgraded detector using Gd2SiO5 (GSO) scintillators

    Y. Makino, O. Adriani, E. Berti, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, M. Haguenauer, Y. Itow, T. Iwata, K. Kasahara, K. Masuda, E. Matsubayashi, H. Menjo, Y. Muraki, P. Papini, S. Ricciarini, T. Sako, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, M. Ueno, Q. D. Zhou

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   845 巻   頁: 490 - 493   2017年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier B.V.  

    The Large Hadron Collider forward (LHCf) experiment measures the forward particle production at the LHC to verify hadronic interaction models used in air shower experiments. We have upgraded very small sampling and imaging calorimeters using GSO scintillators to measure the most energetic particles generated in s=13 TeV p–p collisions at the zero-degree region of the LHC. Upgraded detectors were calibrated at the SPS North area facility in CERN and it was confirmed that the detector can measure electro-magnetic showers with energy resolution of 3% and position resolution of better than 123 μm for 100 GeV electrons. The operation of LHCf in 13 TeV p–p collisions has been successfully completed with integrated luminosity of 5 nb−1. Reconstructed π0 peak with the mass resolution of 3.7% and stability less than 1% during the operation implies that our measurement was stable enough in the high irradiation condition.

    DOI: 10.1016/j.nima.2016.04.074

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  19. Measurements of longitudinal and transverse momentum distributions for neutral pions in the forward-rapidity region with the LHCf detector

    O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D'Alessandro, M. Del Prete, M. Haguenauer, Y. Itow, T. Iwata, K. Kasahara, K. Kawade, Y. Makino, K. Masuda, E. Matsubayashi, H. Menjo, G. Mitsuka, Y. Muraki, P. Papini, A. L. Perrot, S. Ricciarini, T. Sako, N. Sakurai, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, M. Ueno, Q. D. Zhou

    Physical Review D   94 巻 ( 3 )   2016年8月

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    © 2016 CERN. The differential cross sections for inclusive neutral pions as a function of transverse and longitudinal momentum in the very forward-rapidity region have been measured at the LHC with the LHC forward detector in proton-proton collisions at s=2.76 and 7 TeV and in proton-lead collisions at nucleon-nucleon center-of-mass energies of sNN=5.02 TeV. Such differential cross sections in proton-proton collisions are compatible with the hypotheses of limiting fragmentation and Feynman scaling. Comparing proton-proton with proton-lead collisions, we find a sizable suppression of the production of neutral pions in the differential cross sections after subtraction of ultraperipheral proton-lead collisions. This suppression corresponds to the nuclear modification factor value of about 0.1-0.3. The experimental measurements presented in this paper provide a benchmark for the hadronic interaction Monte Carlo simulation codes that are used for the simulation of cosmic ray air showers.

    DOI: 10.1103/PhysRevD.94.032007

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  20. Measurement of very forward neutron energy spectra for 7 TeV proton-proton collisions at the Large Hadron Collider

    O. Adriani, E. Berti, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, M. Del Prete, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, Y. Makino, K. Masuda, E. Matsubayashi, H. Menjo, G. Mitsuka, Y. Muraki, Y. Okuno, P. Papini, A. L. Perrot, S. Ricciarini, T. Sako, N. Sakurai, Y. Sugiura, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, Q. D. Zhou

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   750 巻   頁: 360 - 366   2015年11月

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    © 2015. The Large Hadron Collider forward (LHCf) experiment is designed to use the LHC to verify the hadronic-interaction models used in cosmic-ray physics. Forward baryon production is one of the crucial points to understand the development of cosmic-ray showers. We report the neutron-energy spectra for LHC √s=7 TeV proton-proton collisions with the pseudo-rapidity η ranging from 8.81 to 8.99, from 8.99 to 9.22, and from 10.76 to infinity. The measured energy spectra obtained from the two independent calorimeters of Arm1 and Arm2 show the same characteristic feature before unfolding the detector responses. We unfolded the measured spectra by using the multidimensional unfolding method based on Bayesian theory, and the unfolded spectra were compared with current hadronic-interaction models. The QGSJET II-03 model predicts a high neutron production rate at the highest pseudo-rapidity range similar to our results, and the DPMJET 3.04 model describes our results well at the lower pseudo-rapidity ranges. However, no model perfectly explains the experimental results over the entire pseudo-rapidity range. The experimental data indicate a more abundant neutron production rate relative to the photon production than any model predictions studied here.

    DOI: 10.1016/j.physletb.2015.09.041

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  21. A detailed study on Gd<inf>2</inf>SiO<inf>5</inf> scintillators: Recovery from increased photon yield following irradiation

    T. Sako, Y. Sugiura, Q. Zhou, Y. Makino, E. Matsubayashi, K. Kawade, H. Menjo, K. Masuda

    Journal of Instrumentation   10 巻 ( 6 )   2015年6月

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    Increased light intensity and recovery of GSO scintillators following irradiation were studied by using accelerator beams of 290 MeV/n carbon nuclei. This is the first measurement of recovery phase by using accelerator beams. The obtained results were consistent with previous results obtained by using 60Co gamma rays and UV excitation. We confirmed a 23% increase in light intensity following irradiation with 7.4 kGy as well as exponential recovery on a time scale of 104s. The temporal profile of recovery was fitted by a single exponential with an asymptotic increase of 13±1% relative to the light intensity before irradiation. Active recovery was attempted by exposing an irradiated GSO sample to infrared light with intensity up to 8.3 kW/cm2, but no indication of accelerated recovery was observed.

    DOI: 10.1088/1748-0221/10/06/P06015

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MISC 1

  1. Search for Axionlike Particles Produced in e⁺e⁻ Collisions at Belle II

    F. Abudinén, I. Adachi, H. Aihara, N. Akopov, A. Aloisio, F. Ameli, N. Anh Ky, D. M. Asner, T. Aushev, V. Aushev, V. Babu, S. Baehr, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, J. Baudot, J. Becker, P. K. Behera, J. V. Bennett, E. Bernieri, F. U. Bernlochner, M. Bertemes, M. Bessner, S. Bettarini, V. Bhardwaj, F. Bianchi, T. Bilka, S. Bilokin, D. Biswas, M. Bračko, P. Branchini, N. Braun, T. E. Browder, A. Budano, S. Bussino, M. Campajola, G. Casarosa, C. Cecchi, D. Červenkov, M.-C. Chang, P. Chang, R. Cheaib, V. Chekelian, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, D. Cinabro, L. Corona, L. M. Cremaldi, S. Cunliffe, N. Dash, F. Dattola, E. De La Cruz-Burelo, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, A. De Yta-Hernandez, F. Di Capua, Z. Doležal, T. V. Dong, K. Dort, D. Dossett, G. Dujany, S. Eidelman, T. Ferber, D. Ferlewicz, S. Fiore, A. Fodor, F. Forti, B. G. Fulsom, E. Ganiev, R. Garg, A. Garmash, V. Gaur, A. Gaz, U. Gebauer, A. Gellrich, T. Geßler, R. Giordano, A. Giri, B. Gobbo, R. Godang, P. Goldenzweig, B. Golob, P. Gomis, W. Gradl, E. Graziani, D. Greenwald, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, C. Hearty, M. T. Hedges, I. Heredia de la Cruz, M. Hernández Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, H. Hirata, M. Hoek, M. Hohmann, C.-L. Hsu, Y. Hu, K. Inami, G. Inguglia, J. Irakkathil Jabbar, A. Ishikawa, R. Itoh, P. Jackson, W. W. Jacobs, D. E. Jaffe, E.-J. Jang, S. Jia, Y. Jin, C. Joo, A. B. Kaliyar, J. Kandra, G. Karyan, Y. Kato, H. Kichimi, C. Kiesling, C.-H. Kim, D. Y. Kim, H. J. Kim, S.-H. Kim, Y.-K. Kim, T. D. Kimmel, K. Kinoshita, C. Kleinwort, P. Kodyš, T. Koga, S. Kohani, I. Komarov, S. Korpar, T. M. G. Kraetzschmar, P. Križan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, S. Kurz, Y.-J. Kwon, S. Lacaprara, C. La Licata, L. Lanceri, J. S. Lange, I.-S. Lee, S. C. Lee, P. Leitl, D. Levit, P. M. Lewis, C. Li, L. K. Li, Y. B. Li, J. Libby, K. Lieret, L. Li Gioi, Z. Liptak, Q. Y. Liu, D. Liventsev, S. Longo, T. Luo, C. MacQueen, Y. Maeda, R. Manfredi, E. Manoni, S. Marcello, C. Marinas, A. Martini, M. Masuda, K. Matsuoka, D. Matvienko, F. Meggendorfer, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, R. Mizuk, K. Azmi, G. B. Mohanty, H.-G. Moser, M. Mrvar, F. J. Müller, R. Mussa, I. Nakamura, M. Nakao, H. Nakazawa, A. Natochii, C. Niebuhr, N. K. Nisar, S. Nishida, M. H. A. Nouxman, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, H. Ozaki, P. Pakhlov, A. Paladino, A. Panta, E. Paoloni, S. Pardi, H. Park, S.-H. Park, B. Paschen, A. Passeri, A. Pathak, S. Patra, S. Paul, T. K. Pedlar, I. Peruzzi, R. Peschke, M. Piccolo, L. E. Piilonen, G. Polat, V. Popov, C. Praz, E. Prencipe, M. T. Prim, M. V. Purohit, N. Rad, P. Rados, R. Rasheed, M. Reif, S. Reiter, M. Remnev, I. Ripp-Baudot, M. Ritter, M. Ritzert, G. Rizzo, S. H. Robertson, D. Rodríguez Pérez, J. M. Roney, C. Rosenfeld, A. Rostomyan, N. Rout, D. Sahoo, Y. Sakai, D. A. Sanders, S. Sandilya, A. Sangal, L. Santelj, Y. Sato, V. Savinov, B. Scavino, C. Schwanda, A. J. Schwartz, R. M. Seddon, Y. Seino, A. Selce, K. Senyo, J. Serrano, M. E. Sevior, C. Sfienti, J.-G. Shiu, A. Sibidanov, F. Simon, R. J. Sobie, A. Soffer, E. Solovieva, S. Spataro, B. Spruck, M. Starič, S. Stefkova, Z. S. Stottler, R. Stroili, J. Strube, M. Sumihama, T. Sumiyoshi, D. J. Summers, W. Sutcliffe, H. Svidras, M. Tabata, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, H. Tanigawa, P. Taras, F. Tenchini, D. Tonelli, E. Torassa, K. Trabelsi, M. Uchida, T. Uglov, K. Unger, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, E. Waheed, M. Wakai, H. M. Wakeling, C. H. Wang, M.-Z. Wang, X. L. Wang, A. Warburton, M. Watanabe, S. Watanuki, J. Webb, S. Wehle, M. Welsch, C. Wessel, J. Wiechczynski, H. Windel, E. Won, L. J. Wu, X. P. Xu, B. Yabsley, W. Yan, S. B. Yang, H. Ye, M. Yonenaga, C. Z. Yuan, Y. Yusa, L. Zani, Q. D. Zhou, V. I. Zhukova  

    Physical Review Letters125 巻 ( 16 ) 頁: 161806 - 161806   2020年10月

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    記述言語:英語   出版者・発行元:American Physical Society.  

    We present a search for the direct production of a light pseudoscalar a decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process e⁺e⁻ → γa, a → γγ in the mass range 0.2 < ma < 9.7 GeV/c² using data corresponding to an integrated luminosity of (445±3) pb⁻¹. Light pseudoscalars interacting predominantly with standard model gauge bosons (so-called axionlike particles or ALPs) are frequently postulated in extensions of the standard model. We find no evidence for ALPs and set 95% confidence level upper limits on the coupling strength gaγγ of ALPs to photons at the level of 10⁻³ GeV⁻¹. The limits are the most restrictive to date for 0.2 < ma < 1 GeV/c².

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講演・口頭発表等 18

  1. CKM measurements at the Belle II experiment

    Qi-Dong Zhou

    Conference on Flavor Physics and CP Violation (FPCP2021)  2021年6月8日 

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    開催年月日: 2021年6月

    開催地:Shanghai  

  2. Belle II 実験新読み出しシステムにおけるスローコントロールの開発と評価

    周啓東

    日本物理学会   2020年9月17日 

  3. Belle II実験の初期データから見たB中間子の物理および新物理探索の展望

    周啓東

    日本物理学会   2021年3月15日 

  4. Belle II実験の初期データから見たB中間子の物理および新物理探索の展望

    周啓東

    日本物理学会   2021年3月15日 

  5. Belle II 実験新読み出しシステムにおけるスローコントロールの開発と評価

    周啓東

    日本物理学会   2020年9月17日 

  6. Development and performance of the Belle II DAQ upgrade

    周 啓東

    International Conference on High Energy Physics  2022年7月7日 

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    開催年月日: 2022年7月

    記述言語:英語   会議種別:口頭発表(一般)  

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  7. Belle IIの最新結果 招待有り

    周啓東

    21st International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI 2022)  2022年5月23日 

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    開催年月日: 2022年5月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  8. Belle II 新読み出しシステムの開発と運転状況

    周啓東, 山田悟, 伊藤領介, 中尾幹彦, 鈴木聡, 救仁郷拓人, Yun-Tsung Lai, 樋口岳雄, Patrick Robbe, Daniel Charlet, Eric Jules, Harsh Purwar, Diptaparna Biswas, M. Bessner, O. Hartbrich, Eric Plage, Monique Taurigna, Piotr Kapusta, K. Nishimura, G. Varner, R. Sugiura

    日本物理学会 第77回年次大会  2022年3月17日 

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    開催年月日: 2022年3月

    記述言語:日本語   会議種別:口頭発表(一般)  

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  9. 13TeV 陽子衝突におけるLHCf-ATLAS連動トリガーの開発と評価

    周啓東

    日本物理学会  2015年9月27日 

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  10. The research of cosmic ray with accelerator: LHCf experiment

    周啓東

    Exploration of the Origin of Cosmic Ray Workshop  2017年3月30日 

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  11. The LHCf experiment: the very forward neutral particle measurements at LHC

    周啓東

    The 17th conference on Elastic and Diffractive scattering  2017年6月26日 

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  12. Study of contributions of diffractive processes to forward neutral particle production in p-p collisions at high energies

    周啓東

    日本物理学会  2019年3月15日 

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  13. PCI-express based high-speed readout for the Belle II DAQ Upgrade

    Q. D. Zhou, S. Yamada, P. Robbe, D. Charlet, R. Itoh, M. Nakao, S.Y. Suzuki, T. Kunigo, E. Jules, E. Plaige, M. Taurigna, H. Purwar, O. Hartbrich, M. Bessner, Y. -T. Lai, D.Biswas

    22nd Virtual IEEE Real Time Conference  2020年10月23日 

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  14. Monte Carlo study of diffraction in p-p collisions at √s = 13 TeV with the LHCf detector

    周啓東

    Low-x 2016  2016年6月9日 

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  15. LHCf 光子解析2: 粒子種判別とビームセンター決定 の解析と評価

    周啓東

    日本物理学会  2016年3月19日 

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  16. Belle II 実験DAQアップグレード システムの開発と評価

    周啓東

    日本物理学会  2019年8月17日 

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  17. Belle II DAQ upgrade: firmware development at KEK

    周啓東

    Belle II Trigger and DAQ Workshop  2019年8月27日 

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  18. ATLAS-LHCf joint analysis: study of contributions of diffractive processes to forward neutral particle production

    周啓東

    The 2rd Workshop of Exploration of the Origin of Cosmic Ray  2018年2月26日 

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科研費 4

  1. タウレプトンにおけるレプトンフレーバー破れの探索

    研究課題/研究課題番号:18F18324  2018年11月 - 2021年3月

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    後田 裕, ZHOU QIDONG

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    担当区分:研究分担者  資金種別:その他

    平成30年度は、belle2linkと呼ばれるBelle II実験で共通に使用される高速光データ転送プロトコル及び、Belle II DAQ 制御システムの通信フレームワークを、COPPERのアップグレードモジュール (UGM) に実装するために、FPGAファームウェアの開発を行った。
    現行のBelle II DAQシステムでは、各検出器のフロントエンド電子回路(FEE)からのデジタル化された信号が belle2link を通して収集される。アップグレード後も、UGM が belle2link を使用しないと、各検出器のFEEの変更が必要となり、それに伴う多大な労力、バグを混入させる可能性などから、非常に好ましくないことになる。そこで、UGMにbelle2linkを搭載できることを検証するために、KEKにおいてUGM候補モジュールのテストベンチを構築した。Belle IIのCDC検出器のFEEおよび模擬のFEEとUGMの間に、belle2linkを通してデータ転送を試み、いずれの場合についても転送がエラーなく成功することを確認した。また、これらのbelle2linkの検証テストは海外の共同研究機関においても再現された。
    続いて、DAQの制御システムをUGMに実装するために、ファームウェアを新たに開発した。まず、既存のCOPPERとCDCのFEEを用いて、A7D8、A16D32および連続データアクセス方式を試み、制御コマンドが正しく機能していることを確認した。
    以上の研究結果を含む Belle II DAQシステムのアップグレード計画と開発状況について国際会議(6th KEK Flavor Factory Workshop)でポスター発表を行なった。

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  2. B中間子崩壊でのレプトン普遍性の研究による素粒子標準理論を超える物理の探索

    研究課題/研究課題番号:22H00144  2022年4月 - 2026年3月

    日本学術振興会  科学研究費助成事業 基盤研究(A)  基盤研究(A)

    石川明正, 周啓東, 古賀太一郎, 古賀 太一朗, 周 啓東

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    担当区分:研究分担者 

    現在、素粒子実験において素粒子標準理論のほころびが見え始めている可能性がある。標準理論ではレプトンの種類によらず性質は同じというレプトン普遍性が成り立つ。しかし、クォークを含むB中間子の二つの崩壊B→D(*)τνと B→K(*)μμでレプトン普遍性が破れている可能性があるという結果が複数の実験から発表された。もし、これが本当であれば素粒子物理の一大革命が起こり、新たな素粒子理論を打ち立てる最初の結果となり得る。本研究ではBelle II 実験でB中間子崩壊でのレプトン普遍性を検証する事と、レプトン普遍性の検証を加速するSOI技術を用いた高速軽量半導体ピクセル崩壊点センサーの開発を行う事である。

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  3. BとΥ(2S)中間子崩壊でのレプトン普遍性の研究による新物理の探索

    研究課題/研究課題番号:22K14056  2022年4月 - 2025年3月

    日本学術振興会  科学研究費助成事業 若手研究  若手研究

    周 啓東

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    担当区分:研究代表者 

    配分額:4550000円 ( 直接経費:3500000円 、 間接経費:1050000円 )

    標準理論を超える新物理の探索において、b → c τ ν 過程や b→ s l l過程ではレプトン普遍性の破れを示唆する観測結果が得られている。本研究は、質量の重い第三世代のタウレプトンに着目してb → c τ ν崩壊過程で捉えている新物理の兆候の検証を行う。従来Belle実験のb → c τ ν 測定の3倍量のBelle II実験データを用いるとともに、その解析手法を開拓することによって、測定の精度を上げる。これらにより、レプトン普遍性の破れの有無を明らかにし、標準模型を超える物理の発見を目指す。

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  4. LHC,RHICでの陽子-陽子衝突を用いた陽子-パイ中間子相互作用の研究

    研究課題/研究課題番号:16K17692  2016年4月 - 2019年3月

    日本学術振興会  科学研究費助成事業 若手研究(B)  若手研究(B)

    毛受 弘彰, 周 啓東, 大橋 健

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    本研究を進めるにあたり、スイスにある世界最大の粒子加速器LHCを用いてたLHCfとATLASの2つの実験の共同データ解析体制を確立した。2つの実験グループ間の相互理解を進めるためにまずはシンプルな解析である最前方光子生成における回折事象の寄与の測定を行った。回析事象は、陽子-陽子衝突の内、約20%をしめており、衝突の中心領域での粒子生成が少ない。これを利用し、ATLAS検出器で粒子検出がない事象を選んでLHCf検出器の光子イベントを解析した。陽子-陽子衝突データを用いた陽子-パイ中間子衝突測定の解析は現在進行中であり、この結果も近いうちに公表できる予定である。

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