Updated on 2021/10/22

写真a

 
ZHOU Qidong
 
Organization
Institute for Advanced Research Designated assistant professor
Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI) Designated assistant professor
Title
Designated assistant professor
Contact information
メールアドレス
External link

Degree 1

  1. Ph.D. Science ( 2018.3 ) 

Research Interests 4

  1. New physics search

  2. Particle experiment

  3. Trigger/DAQ

  4. Cosmic ray

Research Areas 1

  1. Natural Science / Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics

Current Research Project and SDGs 1

  1. New phsics search by precise measurement of B meson decays with tau lepton

Research History 4

  1. Nagoya University   Institute for Advanced Research/ Kobayashi-Maskawa Institute for the Origin of Particles and the Universe   Designated assistant professor

    2020.4

  2. High Energy Accelerator Research Organization   Institute of Particle and Nuclear Studies   Researcher

    2018.11 - 2020.3

  3. High Energy Accelerator Research Organization   Institute of Particle and Nuclear Studies   Researcher

    2018.7 - 2018.10

  4. Nagoya University   Institute for Space and Earth Environmental Research   Researcher

    2018.4 - 2018.6

Education 2

  1. Nagoya University   Graduate School of Scinece

    2015.4 - 2018.3

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    Notes: Division of Particle and Astrophysics Science

  2. Nagoya University   Graduate School of Scinece

    2013.4 - 2015.3

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    Notes: Division of Particle and Astrophysics Science

Professional Memberships 3

  1. 高エネルギー物理学研究者会議

    2021.4

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  2. Japan Physical Society

  3. Japan Cosmic Ray Researchers Congress

Awards 2

  1. Japan Cosmic Ray Researchers Congress Cosmic Ray Physics Award

    2019.3   Japan Cosmic Ray Researchers Congress  

  2. Physical Society of Japan Young Scientist Award

    2019.3   Japan Physical Society  

 

Papers 17

  1. 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   Vol. 68 ( 8 ) page: 1826 - 1832   2021.8

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/TNS.2021.3084826

    Web of Science

  2. 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)   Vol. 208   2019

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1051/epjconf/201920805008

    Web of Science

  3. PCI-express based high-speed readout for the Belle II DAQ upgrade Reviewed

    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, K. Nishimura, G. Varner, Y. T. Lai, T. Higuchi, R. Sugiura, D. Biswas, P. Kapusta

    IEEE Transactions on Nuclear Science   Vol. 68 ( 8 ) page: 1818 - 1825   2021.8

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    Belle II is a new-generation B-factory experiment, dedicated to exploring new physics beyond the standard model of elementary particles in the flavor sector. Belle II started data-taking in April 2018, using a synchronous data acquisition (DAQ) system based on pipelined trigger flow control. The Belle II DAQ system is designed to handle a 30-kHz trigger rate with approximately 1of a raw event size of 1 MB. The DAQ system is reliable, and the overall data-taking efficiency reached 84.2the run period of January 2020 to June 2020. The current readout system cannot be operated in the term of 10 years from the viewpoint of DAQ maintainability; meanwhile, the readout system is obstructing high-speed data transmission. A solution involving a PCI-express-based readout module with high data throughput of up to 100 Gb/s was adopted to upgrade the Belle II DAQ system. We particularly focused on the design of firmware and software based on this new generation of readout board, called PCIe40, with an Altera Arria 10 field-programmable gate array chip. Forty-eight GBT (GigaBit Transceiver) serial links, PCI-express hard IP-based DMA architecture, interface of timing and trigger distribution system, and slow control system were designed to integrate with the current Belle II DAQ system. This paper describes the performances accomplished during the data readout and slow control tests conducted using a test bench and a demonstration performed using on-site front-end electronics, specifically involving Belle II TOP and KLM sub-detectors.

    DOI: 10.1109/TNS.2021.3086526

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  4. 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   Vol. 125 ( 16 )   2020.10

  5. 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   Vol. 67 ( 8 ) page: 1904 - 1911   2020.8

  6. 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   Vol. 124 ( 25 )   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.124.252501

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  7. 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   Vol. 124 ( 14 )   2020.4

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    Publisher: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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  8. 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   Vol. 44 ( 2 )   2020.2

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    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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  9. 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

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  10. 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   Vol. 2018 ( 11 )   2018.11

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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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  11. 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   Vol. 780   page: 233 - 239   2018.5

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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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  12. 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   Vol. 77 ( 4 )   2017.4

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    © 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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  13. 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   Vol. 12 ( 3 )   2017.3

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

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

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 845   page: 490 - 493   2017.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.nima.2016.04.074

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  15. 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   Vol. 94 ( 3 )   2016.8

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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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  16. 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   Vol. 750   page: 360 - 366   2015.11

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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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  17. 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   Vol. 10 ( 6 )   2015.6

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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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Presentations 15

  1. CKM measurements at the Belle II experiment

    Qi-Dong Zhou

    Conference on Flavor Physics and CP Violation (FPCP2021)  2021.6.8 

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    Event date: 2021.6

    Venue:Shanghai  

  2. Perspectives on B meson physics from the initial data and prospects of new physics exploration of the Belle II experiment

    Qi-Dong Zhou

    76th Japan Physical Society annual conference   2021.3.15 

  3. Perspectives on B meson physics from the initial data and prospects of new physics exploration of the Belle II experiment

    Qi-Dong Zhou

    76th Japan Physical Society annual conference   2021.3.15 

  4. Development and evaluation of slow control for the Belle II new read-out system

    Qi-Dong Zhou

    Japan Physical Society 2020 Autumn Conference   2020.9.17 

  5. Development and evaluation of slow control for the Belle II new read-out system

    Qi-Dong Zhou

    Japan Physical Society 2020 Autumn Conference   2020.9.17 

  6. 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  2020.10.23 

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  7. Belle II DAQ upgrade: firmware development at KEK

    Qi-Dong Zhou

    Belle II Trigger and DAQ Workshop  2019.8.27 

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  8. Development and evaluation of Belle II DAQ upgrade system

    Qi-Dong Zhou

    Japan Physical Society Annual Conference  2019.8.17 

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

    Qi-Dong Zhou

    Japan Physical Society Annual Conference  2019.3.15 

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

    Qi-Dong Zhou

    The 2rd Workshop of Exploration of the Origin of Cosmic Ray  2018.2.26 

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

    Qi-Dong Zhou

    The 17th conference on Elastic and Diffractive scattering  2017.6.26 

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

    Qi-Dong Zhou

    Exploration of the Origin of Cosmic Ray Workshop  2017.3.30 

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

    Qi-Dong Zhou

    Low-x 2016  2016.6.9 

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  14. LHCf 13 TeV photon analysis: Particle ID evaluation and analysis of beam center

    Qi-Dong Zhou

    Japan Physical Society Annual Conference  2016.3.19 

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  15. Evaluation and development of LHCf-ATLAS trigger system for 13 TeV pp collisions

    Qi-Dong Zhou

    Japan Physical Society Autumn Conference  2015.9.27 

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KAKENHI (Grants-in-Aid for Scientific Research) 2

  1. Search for lepton-flavor-violating tau decays

    Grant number:18F18324  2018.11 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows  Grant-in-Aid for JSPS Fellows

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    Authorship:Coinvestigator(s)  Grant type:Other

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  2. Study of proton-pion interactions using proton-proton collisions at LHC and RHIC

    Grant number:16K17692  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    Menjo Hiroaki, Zhou Quidong, Ohashi Ken, Adamczyk Leszek, Riehn Felix, Ostapchenko Sergey

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    We have successfully formed the joint analysis group of two LHC experiments, LHCf and ATLAS, for this unique measurement of proton-pion interaction study using proton-proton collisions. To understanding each experiment before going to this measurement, a simpler analysis has been performed, which is for measurement of diffractive-collision contribution on the forward photon production. Diffractive collisions are one of the main processes of proton-proton collisions. In these events, few particle are produced in the central region of collisions. Selecting no charged particle detection in the ATLAS detector, we analyzed LHCf photon events. Analysis of proton-pion interaction measurement is on-going and we will publish the result soon.

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