Organization
Graduate School of Science Professor
Graduate School
Graduate School of Science
Undergraduate School
School of Science Department of Physics
Title
Professor
TANABASHI, Masaharu
Degree 1
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博士(理学) （ 1992.2 名古屋大学 ）
Research Areas 1
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Others / Others / Elementary Particle/Atomic Nucleus/Cosmic Ray/Space Physics
Current Research Project and SDGs 2
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Physics beyond the standard model
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Origin of elementary particle masses
Research History 4
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名古屋大学大学院理学研究科 教授
2007.4
Country：Japan
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東北大学大学院理学研究科 助教授
1996.12 - 2007.3
Country：Japan
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高エネルギー物理学研究所 助手
1994.4 - 1996.11
Country：Japan
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National Laboratory for High Energy Physics Researcher
1993.4 - 1994.3
Professional Memberships 3
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日本物理学会 名古屋支部 支部長
2016.4 - 2018.3
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日本物理学会 素粒子論領域代表
2014.4 - 2015.3
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日本物理学会 素粒子論領域副代表
2013.4 - 2014.3
Papers 24
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Navas, S; Amsler, C; Gutsche, T; Hanhart, C; Hernández-Rey, JJ; Lourenço, C; Masoni, A; Mikhasenko, M; Mitchell, RE; Patrignani, C; Schwanda, C; Spanier, S; Venanzoni, G; Yuan, CZ; Agashe, K; Aielli, G; Allanach, BC; Alvarez-Muñiz, J; Antonelli, M; Aschenauer, EC; Asner, DM; Assamagan, K; Baer, H; Banerjee, S; Barnett, RM; Baudis, L; Bauer, CW; Beatty, JJ; Beringer, J; Bettini, A; Biebel, O; Black, KM; Blucher, E; Bonventre, R; Briere, RA; Buckley, A; Burkert, VD; Bychkov, MA; Cahn, RN; Cao, Z; Carena, M; Casarosa, G; Ceccucci, A; Cerri, A; Chivukula, RS; Cowan, G; Cranmer, K; Crede, V; Cremonesi, O; D'Ambrosio, G; Damour, T; de Florian, D; de Gouvêa, A; DeGrand, T; Demers, S; Demiragli, Z; Dobrescu, BA; D'Onofrio, M; Doser, M; Dreiner, HK; Eerola, P; Egede, U; Eidelman, S; El-Khadra, AX; Ellis, J; Eno, SC; Erler, J; Ezhela, VV; Fava, A; Fetscher, W; Fields, BD; Freitas, A; Gallagher, H; Gershon, T; Gershtein, Y; Gherghetta, T; Gonzalez-Garcia, MC; Goodman, M; Grab, C; Gritsan, AV; Grojean, C; Groom, DE; Grünewald, M; Gurtu, A; Haber, HE; Hamel, M; Hashimoto, S; Hayato, Y; Hebecker, A; Heinemeyer, S; Hikasa, K; Hisano, J; Höcker, A; Holder, J; Hsu, L; Huston, J; Hyodo, T; Ianni, A; Kado, M; Karliner, M; Katz, UF; Kenzie, M; Khoze, A; Klein, SR; Krauss, F; Kreps, M; Krizan, P; Krusche, B; Kwon, Y; Lahav, O; Lellouch, LP; Lesgourgues, J; Liddle, AR; Ligeti, Z; Lin, CJ; Lippmann, C; Liss, TM; Lister, A; Littenberg, L; Lugovsky, KS; Lugovsky, SB; Lusiani, A; Makida, Y; Maltoni, F; Manohar, AV; Marciano, WJ; Matthews, J; Meissner, UG; Melzer-Pellmann, IA; Mertsch, P; Miller, DJ; Milstead, D; Mönig, K; Molaro, P; Moortgat, F; Moskovic, M; Nagata, N; Nakamura, K; Narain, M; Nason, P; Nelles, A; Neubert, M; Nir, Y; O'Connell, HB; O'Hare, CAJ; Olive, KA; Peacock, JA; Pianori, E; Pich, A; Piepke, A; Pietropaolo, F; Pomarol, A; Pordes, S; Profumo, S; Quadt, A; Rabbertz, K; Rademacker, J; Raffelt, G; Ramsey-Musolf, M; Richardson, P; Ringwald, A; Robinson, DJ; Roesler, S; Rolli, S; Romaniouk, A; Rosenberg, LJ; Rosner, JL; Rybka, G; Ryskin, MG; Ryutin, RA; Safdi, B; Sakai, Y; Sarkar, S; Sauli, F; Schneider, O; Schönert, S; Scholberg, K; Schwartz, AJ; Schwiening, J; Scott, D; Sefkow, F; Seljak, U; Sharma, V; Sharpe, SR; Shiltsev, V; Signorelli, G; Silari, M; Simon, F; Sjöstrand, T; Skands, P; Skwarnicki, T; Smoot, GF; Soffer, A; Sozzi, MS; Spiering, C; Stahl, A; Sumino, Y; Takahashi, F; Tanabashi, M; Tanaka, J; Tasevsky, M; Terao, K; Terashi, K; Terning, J; Thoma, U; Thorne, RS; Tiator, L; Titov, M; Tovey, DR; Trabelsi, K; Urquijo, P; Valencia, G; Van de Water, R; Varelas, N; Verde, L; Vivarelli, I; Vogel, P; Vogelsang, W; Vorobyev, V; Wakely, SP; Walkowiak, W; Walter, CW; Wands, D; Weinberg, DH; Weinberg, EJ; Wermes, N; White, M; Wiencke, LR; Willocq, S; Woody, CL; Workman, RL; Yao, WM; Yokoyama, M; Yoshida, R; Zanderighi, G; Zeller, GP; Zhu, RY; Zhu, SL; Zimmermann, F; Zyla, PA; Anderson, J; Kramer, M; Schaffner, P; Zheng, W
PHYSICAL REVIEW D Vol. 110 ( 3 ) 2024.8
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Workman, RL; Burkert, VD; Crede, ; Klempt, E; Thoma, U; Tiator, L; Agashe, K; Aielli, G; Allanach, BC; Amsler, C; Antonelli, M; Aschenauer, EC; Asner, DM; Baer, H; Banerjee, S; Barnett, RM; Baudis, L; Bauer, CW; Beatty, JJ; Belousov, V; Beringer, J; Bettini, A; Biebel, O; Black, KM; Blucher, E; Bonventre, R; Bryzgalov, VV; Buchmuller, O; Bychkov, MA; Cahn, RN; Carena, M; Ceccucci, A; Cerri, A; Chivukula, RS; Cowan, G; Cranmer, K; Cremonesi, O; D'Ambrosio, G; Damour, T; de Florian, D; de Gouvêa, A; DeGrand, T; de Jong, P; Demers, S; Dobrescu, BA; D'Onofrio, M; Doser, M; Dreiner, HK; Eerola, P; Egede, U; Eidelman, S; El-Khadra, AX; Ellis, J; Eno, SC; Erler, J; Ezhela, VV; Fetscher, W; Fields, BD; Freitas, A; Gallagher, H; Gershtein, Y; Gherghetta, T; Gonzalez-Garcia, MC; Goodman, M; Grab, C; Gritsan, A; Grojean, C; Groom, DE; Grünewald, M; Gurtu, A; Gutsche, T; Haber, HE; Hamel, M; Hanhart, C; Hashimoto, S; Hayato, Y; Hebecker, A; Heinemeyer, S; Hernández-Rey, JJ; Hikasa, K; Hisano, J; Höcker, A; Holder, J; Hsu, L; Huston, J; Hyodo, T; Ianni, A; Kado, M; Karliner, M; Katz, UF; Kenzie, M; Khoze, VA; Klein, SR; Krauss, F; Kreps, M; Krizan, P; Krusche, B; Kwon, Y; Lahav, O; Laiho, J; Lellouch, LP; Lesgourgues, J; Liddle, AR; Ligeti, Z; Lin, CJ; Lippmann, C; Liss, TM; Littenberg, L; Lourenço, C; Lugovsky, KS; Lugovsky, SB; Lusiani, A; Makida, Y; Maltoni, F; Mannel, T; Manohar, A; Marciano, WJ; Masoni, A; Matthews, J; Meissner, UG; Melzer-Pellmann, IA; Mikhasenko, M; Miller, DJ; Milstead, D; Mitchell, RE; Mönig, K; Molaro, P; Moortgat, F; Moskovic, M; Nakamura, K; Narain, M; Nason, P; Navas, S; Nelles, A; Neubert, M; Nevski, P; Nir, Y; Olive, KA; Patrignani, C; Peacock, JA; Petrov, VA; Pianori, E; Pich, A; Piepke, A; Pietropaolo, F; Pomarol, A; Pordes, S; Profumo, S; Quadt, A; Rabbertz, K; Rademacker, J; Raffelt, G; Ramsey-Musolf, M; Ratcliff, BN; Richardson, P; Ringwald, A; Robinson, DJ; Roesler, S; Rolli, S; Romaniouk, A; Rosenberg, LJ; Rosner, JL; Rybka, G; Ryskin, MG; Ryutin, RA; Sakai, Y; Sarkar, S; Sauli, F; Schneider, O; Schönert, S; Scholberg, K; Schwartz, AJ; Schwiening, J; Scott, D; Sefkow, F; Seljak, U; Sharma, ; Sharpe, SR; Shiltsev, ; Signorelli, G; Silari, M; Simon, F; Sjöstrand, T; Skands, P; Skwarnicki, T; Smoot, GF; Soffer, A; Sozzi, MS; Spanier, S; Spiering, C; Stahl, A; Stone, SL; Sumino, Y; Syphers, MJ; Takahashi, F; Tanabashi, M; Tanaka, J; Tasevsky, M; Terao, K; Terashi, K; Terning, J; Thorne, RS; Titov, M; Tkachenko, NP; Tovey, DR; Trabelsi, K; Urquijo, P; Valencia, G; Van de Water, R; Varelas, N; Venanzoni, G; Verde, L; Vivarelli, ; Vogel, P; Vogelsang, W; Vorobyev, V; Wakely, SP; Walkowiak, W; Walter, CW; Wands, D; Weinberg, DH; Weinberg, EJ; Wermes, N; White, M; Wiencke, LR; Willocq, S; Wohl, CG; Woody, CL; Yao, WM; Yokoyama, M; Yoshida, R; Zanderighi, G; Zeller, GP; Zenin, O; Zhu, RY; Zhu, SL; Zimmermann, F; Zyla, PA; Anderson, J; Basaglia, T; Schaffner, P; Zheng, W
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS Vol. 2022 ( 8 ) 2022.8
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Scalar and fermion on-shell amplitudes in generalized Higgs effective field theory
Nagai, R; Tanabashi, M; Tsumura, K; Uchida, Y
PHYSICAL REVIEW D Vol. 104 ( 1 ) 2021.7
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REVIEW OF PARTICLE PHYSICS Reviewed
Zyla, PA; Barnett, RM; Beringer, J; Dahl, O; Dwyer, DA; Groom, DE; Lin, CJ; Lugovsky, KS; Pianori, E; Robinson, DJ; Wohl, CG; Yao, WM; Agashe, K; Aielli, G; Allanach, BC; Amsler, C; Antonelli, M; Aschenauer, EC; Asner, DM; Baer, H; Banerjee, S; Baudis, L; Bauer, CW; Beatty, JJ; Belousov, VI; Bethke, S; Bettini, A; Biebel, O; Black, KM; Blucher, E; Buchmuller, O; Burkert, V; Bychkov, MA; Cahn, RN; Carena, M; Ceccucci, A; Cerri, A; Chakraborty, D; Chivukula, RS; Cowan, G; D'Ambrosio, G; Damour, T; de Florian, D; de Gouvêa, A; DeGrand, T; de Jong, P; Dissertori, G; Dobrescu, BA; D'Onofrio, M; Doser, M; Drees, M; Dreiner, HK; Eerola, P; Egede, U; Eidelman, S; Ellis, J; Erler, J; Ezhela, VV; Fetscher, W; Fields, BD; Foster, B; Freitas, A; Gallagher, H; Garren, L; Gerber, HJ; Gerbier, G; Gershon, T; Gershtein, Y; Gherghetta, T; Godizov, AA; Gonzalez-Garcia, MC; Goodman, M; Grab, C; Gritsan, AV; Grojean, C; Grünewald, M; Gurtu, A; Gutsche, T; Haber, HE; Hanhart, C; Hashimoto, S; Hayato, Y; Hebecker, A; Heinemeyer, S; Heltsley, B; Hernández-Rey, JJ; Hikasa, K; Hisano, J; Höcker, A; Holder, J; Holtkamp, A; Huston, J; Hyodo, T; Johnson, KF; Kado, M; Karliner, M; Katz, UF; Kenzie, M; Khoze, VA; Klein, SR; Klempt, E; Kowalewski, RV; Krauss, F; Kreps, M; Krusche, B; Kwon, Y; Lahav, O; Laiho, J; Lellouch, LP; Lesgourgues, J; Liddle, AR; Ligeti, Z; Lippmann, C; Liss, TM; Littenberg, L; Lourenço, C; Lugovsky, SB; Lusiani, A; Makida, Y; Maltoni, F; Mannel, T; Manohar, AV; Marciano, WJ; Masoni, A; Matthews, J; Meissner, UG; Mikhasenko, M; Miller, DJ; Milstead, D; Mitchell, RE; Mönig, K; Molaro, P; Moortgat, F; Moskovic, M; Nakamura, K; Narain, M; Nason, P; Navas, S; Neubert, M; Nevski, P; Nir, Y; Olive, KA; Patrignani, C; Peacock, JA; Petcov, ST; Petrov, VA; Pich, A; Piepke, A; Pomarol, A; Profumo, S; Quadt, A; Rabbertz, K; Rademacker, J; Raffelt, G; Ramani, H; Ramsey-Musolf, M; Ratcliff, BN; Richardson, P; Ringwald, A; Roesler, S; Rolli, S; Romaniouk, A; Rosenberg, LJ; Rosner, JL; Rybka, G; Ryskin, M; Ryutin, RA; Sakai, Y; Salam, GP; Sarkar, S; Sauli, F; Schneider, O; Scholberg, K; Schwartz, AJ; Schwiening, J; Scott, D; Sharma, V; Sharpe, SR; Shutt, T; Silari, M; Sjöstrand, T; Skands, P; Skwarnicki, T; Smoot, GF; Soffer, A; Sozzi, MS; Spanier, S; Spiering, C; Stahl, A; Stone, SL; Sumino, Y; Sumiyoshi, T; Syphers, MJ; Takahashi, F; Tanabashi, M; Tanaka, J; Tasevsky, M; Terashi, K; Terning, J; Thoma, U; Thorne, RS; Tiator, L; Titov, M; Tkachenko, NP; Tovey, DR; Trabelsi, K; Urquijo, P; Valencia, G; Van de Water, R; Varelas, N; Venanzoni, G; Verde, L; Vincter, MG; Vogel, P; Vogelsang, W; Vogt, A; Vorobyev, V; Wakely, SP; Walkowiak, W; Walter, CW; Wands, D; Wascko, MO; Weinberg, DH; Weinberg, EJ; White, M; Wiencke, LR; Willocq, S; Woody, CL; Workman, RL; Yokoyama, M; Yoshida, R; Zanderighi, G; Zeller, GP; Zenin, OV; Zhu, RY; Zhu, SL; Zimmermann, F; Anderson, J; Basaglia, T; Lugovsky, VS; Schaffner, P; Zheng, W
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS Vol. 2020 ( 8 ) 2020.8
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Nagai, R; Tanabashi, M; Tsumura, K; Uchida, Y
PHYSICAL REVIEW D Vol. 100 ( 7 ) 2019.10
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REVIEW OF PARTICLE PHYSICS Reviewed
Tanabashi, M; Hagiwara, K; Hikasa, K; Nakamura, K; Sumino, Y; Takahashi, F; Tanaka, J; Agashe, K; Aielli, G; Amsler, C; Antonelli, M; Asner, DM; Baer, H; Banerjee, S; Barnett, RM; Basaglia, T; Bauer, CW; Beatty, JJ; Belousov, VI; Beringer, J; Bethke, S; Bettini, A; Bichsel, H; Biebel, O; Black, KM; Blucher, E; Buchmuller, O; Burkert, V; Bychkov, MA; Cahn, RN; Carena, M; Ceccucci, A; Cerri, A; Chakraborty, D; Chen, MC; Chivukula, RS; Cowan, G; Dahl, O; D'Ambrosio, G; Damour, T; Florian, D; Gouvea, A; DeGrand, T; Jong, P; Dissertori, G; Dobrescu, BA; D'Onofrio, M; Doser, M; Drees, M; Dreiner, HK; Dwyer, DA; Eerola, P; Eidelman, S; Ellis, J; Erler, J; Ezhela, VV; Fetscher, W; Fields, BD; Firestone, R; Foster, B; Freitas, A; Gallagher, H; Garren, L; Gerber, HJ; Gerbier, G; Gershon, T; Gershtein, Y; Gherghetta, T; Godizov, AA; Goodman, M; Grab, C; Gritsan, AV; Grojean, C; Groom, DE; Grunewald, M; Gurtu, A; Gutsche, T; Haber, HE; Hanhart, C; Hashimoto, S; Hayato, Y; Hayes, KG; Hebecker, A; Heinemeyer, S; Heltsley, B; Hernandez-Rey, JJ; Hisano, J; Hocker, A; Holder, J; Holtkamp, A; Hyodo, T; Irwin, KD; Johnson, KF; Kado, M; Karliner, M; Katz, UF; Klein, SR; Klempt, E; Kowalewski, RV; Krauss, F; Kreps, M; Krusche, B; Kuyanov, YV; Kwon, Y; Lahav, O; Laiho, J; Lesgourgues, J; Liddle, A; Ligeti, Z; Lin, CJ; Lippmann, C; Liss, TM; Littenberg, L; Lugovsky, KS; Lugovsky, SB; Lusiani, A; Makida, Y; Maltoni, F; Mannel, T; Manohar, AV; Marciano, WJ; Martin, AD; Masoni, A; Matthews, J; Meissner, UG; Milstead, D; Mitche, RE; Moenig, K; Molaro, P; Moortgat, F; Moskovic, M; Murayama, H; Narain, M; Nason, P; Navas, S; Neubert, M; Nevski, P; Nir, Y; Olive, KA; Griso, SP; Parsons, J; Patrignani, C; Peacock, JA; Pennington, M; Petcov, ST; Petrov, VA; Pianori, E; Piepke, A; Pomarol, A; Quadt, A; Rademacker, J; Raffelt, G; Ratcliff, BN; Richardson, P; Ringwald, A; Roesler, S; Rolli, S; Romaniouk, A; Rosenberg, LJ; Rosner, JL; Rybka, G; Ryutin, RA; Sachrajda, CT; Sakai, Y; Salam, GP; Sarkar, S; Sauli, F; Schneider, O; Scholberg, K; Schwartz, AJ; Scott, D; Sharma, V; Sharpe, SR; Shutt, T; Silari, M; Sjostrand, T; Skands, P; Skwarnicki, T; Smith, JG; Smoot, GF; Spanier, S; Spieler, H; Spiering, C; Stah, A; Stone, SL; Sumiyoshi, T; Syphers, MJ; Terashi, K; Terning, J; Thoma, U; Thorne, RS; Tiator, L; Titov, M; Tkachenko, NP; Tornqvist, NA; Tovey, DR; Valencia, G; de Water, R; Varelas, N; Venanzoni, G; Verde, L; Vincter, MG; Voge, P; Vogt, A; Wakely, SP; Walkowiak, W; Walter, CW; Wands, D; Ward, DR; Wascko, MO; Weiglein, G; Weinberg, DH; Weinberg, EJ; White, M; Wiencke, LR; Willocq, S; Woh, CC; Womersley, J; Woody, CL; Workman, RL; Yao, WM; Zeller, GP; Zenin, OV; Zhu, RY; Zhu, SL; Zimmermann, F; Zyla, PA; Anderson, J; Fuller, L; Lugovsky, VS; Schaffner, P
PHYSICAL REVIEW D Vol. 98 ( 3 ) 2018.8
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Relic Abundance in a Secluded Dark Matter Scenario with a Massive Mediator Reviewed
Shohei Okawa, Masaharu Tanabashi, and Masato Yamanaka
Physical Review D Vol. 95 ( 2 ) page： 023006 2017.1
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Review of Particle Physics Reviewed
C. Patrignani et al (PDG Collaboration)
Vol. 40 ( 10 ) page： 100001 2016
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Unitarity sum rules, three-site moose model, and the ATLAS 2 TeV diboson anomalies Reviewed
Tomohiro Abe, Ryo Nagai, Shohei Okawa, Masaharu Tanabashi
Phys. Rev. D Vol. 92 page： 055016 2015
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Does unitarity imply finiteness of electroweak oblique corrections at one loop? Constraining extra neutral Higgs bosons Reviewed
Ryo Nagai, Masaharu Tanabashi, Koji Tsumura
Phys. Rev. D Vol. 91 page： 034030 2015
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Review of Particle Physics Reviewed
K.A. Olive et al. (PDG Collaboration)
Chin. Phys. C Vol. 38 page： 090001 2014
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Review of Particle Physics Reviewed
PDG Collaboration (J.Beringer et al.)
Physical Review D Vol. 86 page： 010001 2012.7
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The Flavor Structure of the Three-Site Higgsless Model Reviewed
Tomohiro Abe, R.Sekhar Chivukula, Elizabeth H. Simmons, Masaharu Tanabashi
Phys. Rev. D Vol. 85 ( 3 ) page： 035015 2012.2
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Review of Particle Physics Reviewed
K. Nakamura et al.
J.Phys.G Vol. 37 ( 7A ) page： 075021 2010.7
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W_L W_L scattering in Higgsless models: Identifying better effective theories Reviewed
A.S.Beyaev, R.S.Chivukula, N.D.Christensen, H.-J.He, M.Kurachi, E.H.Simmons, M.Tanabashi
Physical Review D Vol. 80 page： 055022 2009.9
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Z -> bbbar and chiral currents in Higgsless models Reviewed
T.Abe, R.S.Chivukula, N.D.Christensen, K.Hsieh, S.Matsuzaki, E.H.Simmons, M.Tanabashi
Physical Review D Vol. 79 page： 075016 2009.4
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General Sum Rules for WW Scattering in Higgsless Models: Equivalence Theorem and Deconstruction Identities Reviewed
R.S. Chivukuka, H.-J. He, M. Kurachi, E.H. Simmons, M. Tanabashi
Physical Review D Vol. 78 ( 9 ) page： 095003 2008.11
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Does the three site Higgsless model survive the electroweak precision tests at loop? Reviewed
Tomohiro Abe, Shinya Matsuzaki, and Masaharu Tanabashi
Physical Review D Vol. 78 ( 5 ) page： 055020 2008.9
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Review of Particle Physics Invited Reviewed
Particle Data Group (C. Amler et al.)
Physics Letters B Vol. 667 ( 1 ) page： 1-1340 2008.7
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*Universal non-oblique corrections in Higgsless models and beyond Reviewed
R.S.Chivukula, H.-J. He, M.Kurachi, E.H.Simmons, M.Tanabashi
Phys.Lett.B Vol. 603 page： 210 2004
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*The Structure of corrections to electroweak interactions in Higgsless models. Reviewed
R.S.Chivukula, M.Kurachi, H.-J. He, M. Kurachi, E.H.Simmons, M.Tanabashi
Phys.Rev.D Vol. 70 page： 075008 2004
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*Chiral perturbation to one loop including the rho meson Reviewed
M.Tanabashi
Phys.Lett.B Vol. 316 page： 534 1993
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*Dynamical Electroweak Symmetry Breaking with Large Anomalous Dimension and t Quark Condensate Reviewed
V.A.Miransky, M.Tanabashi, K.Yamawaki
Phys.Lett.B Vol. 221 page： 177 1989
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*Is the t Quark Responsible for the Mass of W and Z Bosons? Reviewed
V.A.Miransky, M.Tanabashi, K.Yamawaki
Mod.Phys.Lett.A Vol. 4 page： 1043 1989
Presentations 6
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電弱対称性の破れとヒッグス物理 Invited
棚橋誠治
Flavor Physics Workshiop 2022 2022.11.10
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小林・益川理論の誕生
棚橋誠治
小林・益川理論50周年 2022.1.14 名古屋大学素粒子宇宙起源研究所
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PDG Japan International coauthorship International conference
Masaharu Tanabashi
Particle Data Group Collaboration Meeting 2018.10.27 Particle Data Collaboration
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Roles of perturbative unintarity in extended Higgs scenarios Invited International conference
Masaharu Tanabashi
2015.11.9
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Flavors of Three-site Higgsless International conference
Masaharu Tanabashi
International Workshoip: Extra Dimensions in the Era of LHC
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Shoichi Sakata: His Life and Physics International conference
Masaharu Tanabashi
Shoichi Sakata Centennial Symposium
KAKENHI (Grants-in-Aid for Scientific Research) 5
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Grant number：23K03413 2023.4 - 2027.3
科学研究費助成事業 基盤研究(C)
棚橋 誠治
Authorship：Principal investigator
Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）
広い範囲の素粒子標準模型を超える物理における新粒子の生成断面積等の素粒子現象をその輻射補正を含めて系統的に計算することができ、なおかつ、標準模型粒子の精密測定に使用される標準模型有効理論（SMEFT)やヒッグス有効理論（HEFT）との親和性も高い有効理論を構築し、なるべく簡便な形で新粒子の生成断面積等の計算を実行可能な理論形式を確立することを目指す。
その起源が量子色力学の次元変性であることが知られているQCDスケールと異なり、電弱対称性の破れのスケール、つまり素粒子質量の起源はいまだ明らかになっていない。素粒子標準理論における説明はツリーレベルのヒッグスポテンシャルのパラメータ調整によるものであるが、QCDの場合とは異なり、この説明での電弱対称性の破れのスケールは古典的に禁止されておらず、巨大な量子補正を受けてしまう。したがって、電弱対称性の破れのスケールの小ささを説明するためには、パラメータの微調整が必要となる。この問題を解決するため、これまで多くの素粒子標準理論を超える物理の可能性が検討されてきた。本研究は、これらの素粒子標準理論を超える物理を個々に調べるのではなく、統一的な有効理論を構築することで、模型の詳細によらない制限を得ようとするものである。有効理論を用いて素粒子標準理論を超える物理に含まれる新粒子を調べるには、これらの新粒子を含む有効理論を構築せねばならない。クォークレプトンの複合模型や、レプトクォーク模型は、有効理論を用いた解析が特に有用であることが知られている。研究代表者は、パーティクルデータグループ共同研究において、クォークレプトンの複合模型とレプトクォーク模型の解説記事の執筆を担当しており、本研究課題の研究で得た知見をもとに、これらの模型の有効理論構築についてと、現在までに行われた素粒子実験によるこれらの模型への制限についての解説記事の執筆を行った。さらに高階微分を含む有効場の理論の構築とその輻射補正の構造を明らかにした。
パーティクルデータグループにおけるクォークレプトンの複合模型とレプトクォーク模型についての解説記事の執筆を遅滞なく進めることができ、その成果はすでにウェブで公開されている。また、2024年夏にはこれらの解説記事が査読つきジャーナルで出版される予定になっている。これらと並行して高階微分項をふくむ有効場の理論の構築をすすめており、補助場の方法を用いた具体的構成法の研究をすすめている。ヒッグスポテンシャルに含まれる質量パラメータは、素粒子標準理論の基礎的ツリーレベルパラメータのなかで唯一の質量次元を持つパラメータであり、現在までに知られているすべての素粒子質量を決定する電弱エネルギースケールの起源となるパラメータである。一方、ヒッグスラグランジアンには、ポテンシャル以外に運動項が存在し、ここからヒッグス内部空間(ヒッグス多様体)の計量テンソルを読み取ることができる。この見方に立つと、ヒッグスラグランジアンは ヒッグス多様体上の非線形シグマ模型に他ならない。ヒッグス場を点変換することでラグランジアンの見かけの形が変化することに注意が必要であり、とくに、有効ラグランジアンが高階微分を含む時の解析はこれまでにほとんどなされていなかった。本研究ですすめている補助場を用いた方法はこの欠点を解消するものであり、本研究課題は順調に進捗しているといえる。
これまでの研究で、任意の量子数をもつ新素粒子をヒッグス有効理論に導入したときの有効理論、つまり、一般化されたヒッグス有効理論の構造が、高階微分ラグランジアンの影響まで含めて明らかになりつつある。しかし、高階微分ラグランジアンを補助場をもちいて記述する方法には複数の手法が存在するため、お互いの関係を調べる必要がある。これまでの研究はまた、有効場の理論の手法開拓に関するものであり、これらの手法を実際に、拡張ヒッグス模型、レプトクォーク模型、ダイクォーク模型、ダイレプトン模型、クォークレプトンの複合模型にどのように適用し、コライダー物理やフレーバー物理への影響を定量的に調査するところまでは至っていない。これらの状況を鑑み、当面は、複数の有効場の理論の間の関係を理論的に調査する研究に注力するものの、徐々に実際の素粒子現象への応用研究にシフトしていきたいと考えている。具体的には、LHC実験や将来の加速器実験における新素粒子の生成断面積や、フレーバー物理への新素粒子の影響を、一般化されたヒッグス有効理論の枠組みで評価する研究を進めたいと考えている。 -
Unification of Low Energy Standard Model Effective Field Theories
Grant number：19K03846 2019.4 - 2024.3
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Tanabashi Masaharu
Authorship：Principal investigator
Grant amount：\4420000 （ Direct Cost: \3400000 、 Indirect Cost：\1020000 ）
We formulate a generalization of Higgs effective field theory (HEFT) including arbitrary number of extra neutral and charged Higgs bosons (generalized HEFT, GHEFT). It is shown that the scalar boson scattering amplitudes are described in terms of the Riemann curvature tensor (geometry) of the scalar manifold and the covariant derivatives of the potential. The coefficients of the one-loop divergent terms can also be written in terms of the Killing vectors (symmetry) and the Riemann curvature tensor (geometry).
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We also formulate an extension of Higgs effective field theory which contains arbitrary number of scalar and fermion fields with arbitrary electric and chromoelectric charges. The chiral order counting rule is arranged consistently with the loop expansion. The parametrization redundancy in the effective Lagrangian is resolved by describing the on-shell scattering amplitudes only with the covariant quantities in the scalar/fermion field space. -
ヒッグス結合の精密測定から探る標準模型を超える物理
2015.4 - 2019.3
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator
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Search for Physics Beyond the Standard Model from the Higgs Precision Measurements
Grant number：15K05047 2015.4 - 2019.3
Tanabashi Masaharu
Authorship：Principal investigator
Grant amount：\4810000 （ Direct Cost: \3700000 、 Indirect Cost：\1110000 ）
We investigate W′ interpretations for the ATLAS 2 TeV diboson anomalies. We find the unitarity sum rules and the custodial symmetry are powerful enough to predict various nontrivial relations among WWZ′, WZW′, WWh, WW′h and ZZ′h coupling strengths in a model independent manner.
A generalization of Higgs effective field theory (HEFT) including arbitrary number of extra neutral and charged Higgs bosons (generalized HEFT, GHEFT) is formulated to describe non-minimal electroweak symmetry breaking models. It is shown that the scalar boson scattering amplitudes are described in terms of the Riemann curvature tensor (geometry) of the scalar manifold and the covariant derivatives of the potential.
We also prposed a novel possibility of the DM model buildings in which the mediator particle m is unified with the DM particle d in an approximate dark symmetry multiplet. A pionic DM model is proposed to illustrate this idea in a renormalizable field theory framework. -
脱構築余剰次元と電弱対称性の破れの素粒子現象
2008
科学研究費補助金 基盤研究(C)，課題番号：20540263
棚橋 誠治
Authorship：Principal investigator
Teaching Experience (On-campus) 3
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電磁気学Ⅰ
2023
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Quantum Mechanics I
2017
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Foundations of Electromagnetics I
2011
Teaching Experience (Off-campus) 4
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集中講義
2017.1 （Niigata University）
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集中講義
2012.2 （The University of Tokyo）
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2008.4 - 2009.3 （東北大学(集中講義)）
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2007.4 - 2008.3 （広島大学(集中講義)）
Media Coverage 1
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小林・益川理論50年 Newspaper, magazine
東京新聞 2023.3