Search for lepton-flavor-violating tau-lepton decays to ℓγ at Belle

Uno, K.; Hayasaka, K.; Inami, K.; Adachi, I.; Aihara, H.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Babu, V.; Bennett, J.; Bernlochner, F.; Bessner, M.; Bhardwaj, V.; Biswal, J.; Bobrov, A.; Bonvicini, G.; Bozek, A.; Bračko, M.; Campajola, M.; Červenkov, D.; Chang, M. -C.; Cho, H. E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Dash, N.; Di Capua, F.; Dingfelder, J.; Doležal, Z.; Dong, T. V.; Eidelman, S.; Epifanov, D.; Ferber, T.; Frey, A.; Fulsom, B. G.; Garg, R.; Gaur, V.; Gabyshev, N.; Garmash, A.; Giri, A.; Goldenzweig, P.; Hadjivasiliou, C.; Hara, T.; Hartbrich, O.; Hayashii, H.; Hernandez Villanueva, M.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jin, Y.; Joo, K. K.; Kang, K. H.; Kato, Y.; Kichimi, H.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, S. H.; Kodyš, P.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Križan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kumar, M.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y. -J.; Lai, Y. -T.; Lange, J. S.; Lee, S. C.; Li, Y. B.; Gioi, L. Li; Libby, J.; Lieret, K.; Liventsev, D.; MacQueen, C.; Masuda, M.; Matsuoka, K.; Matvienko, D.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Nakao, M.; Nakazawa, H.; Natochii, A.; Nayak, L.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Nishimura, K.; Ogawa, K.; Ogawa, S.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pardi, S.; Park, H.; Park, S. -H.; Paul, S.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Röhrken, M.; Rostomyan, A.; Rout, N.; Russo, G.; Sahoo, D.; Sakai, Y.; Sandilya, S.; Sangal, A.; Santelj, L.; Sanuki, T.; Savinov, V.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Sharma, C.; Shen, C. P.; Shiu, J. -G.; Shwartz, B.; Simon, F.; Sokolov, A.; Solovieva, E.; Starič, M.; Stottler, Z. S.; Sumihama, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tanida, K.; Tao, Y.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Ushiroda, Y.; Usov, Y.; Vahsen, S. E.; Van Tonder, R.; Varner, G.; Vinokurova, A.; Vossen, A.; Waheed, E.; Wang, C. H.; Wang, E.; Wang, M. -Z.; Wang, X. L.; Werbycka, O.; Won, E.; Yabsley, B. D.; Yan, W.; Ye, H.; Yin, J. H.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.

doi:10.1007/jhep10(2021)019

Search for lepton-flavor-violating tau-lepton decays to ℓγ at Belle

Journal Article · Mon Oct 04 00:00:00 EDT 2021 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep10(2021)019· OSTI ID:1828884

; Hayasaka, K.; Inami, K.; Adachi, I.; Aihara, H.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Babu, V.; Bennett, J.; Bernlochner, F.; Bessner, M.; Bhardwaj, V.; Biswal, J.; Bobrov, A.; Bonvicini, G.; Bozek, A.; Bračko, M.; Campajola, M. more »

Charged lepton flavor violation is forbidden in the Standard Model but possible in several new physics scenarios. In many of these models, the radiative decays τ^± → ℓ^±γ (ℓ = e, μ) are predicted to have a sizeable probability, making them particularly interesting channels to search at various experiments. An updated search via τ^± → ℓ^±γ using full data of the Belle experiment, corresponding to an integrated luminosity of 988 fb^–1, is reported for charged lepton flavor violation. No significant excess over background predictions from the Standard Model is observed, and the upper limits on the branching fractions, B(τ^± → μ^±γ) ≤ 4.2 × 10^–8 and B(τ^± → e^±γ) ≤ 5.6 × 10^–8, are set at 90% confidence level.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Sponsoring Organization:: National Science Foundation; USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: The BELLE collaboration

Grant/Contract Number:: SC0009973; SC0012704

OSTI ID:: 1828884

Alternate ID(s):: OSTI ID: 1837923

Report Number(s):: BNL--222359-2021-JAAM

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 10 Vol. 2021; ISSN 1029-8479

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

References (17)

Measurement of the Michel parameters in leptonic tau decays Ackerstaff et al., K. The European Physical Journal C, Vol. 8, Issue 1 https://doi.org/10.1007/s100520050441	journal	January 1999
Measurement of the Michel parameters in leptonic tau decays Ackerstaff et al., K. The European Physical Journal C, Vol. 8, Issue 1 https://doi.org/10.1007/s100529901080	journal	March 1999
Monte Carlo simulation of two-photon processes Berends, F. A.; Daverveldt, P. H.; Kleiss, R. Computer Physics Communications, Vol. 40, Issue 2-3 https://doi.org/10.1016/0010-4655(86)90115-3	journal	June 1986
Monte Carlo program BHLUMI 2.01 for Bhabha scattering at low angles with Yennie-Frautschi-Suura exponentiation Jadach, S.; Richter-Wa̧s, E.; Ward, B. F. L. Computer Physics Communications, Vol. 70, Issue 2 https://doi.org/10.1016/0010-4655(92)90196-6	journal	June 1992
The principal axis of jets — an attempt to analyse high-energy collisions as two-body processes Brandt, S.; Peyrou, Ch.; Sosnowski, R. Physics Letters, Vol. 12, Issue 1 https://doi.org/10.1016/0031-9163(64)91176-X	journal	September 1964
The precision Monte Carlo event generator for two-fermion final states in collisions Jadach, S.; Ward, B. F. L.; Wa̧s, Z. Computer Physics Communications, Vol. 130, Issue 3 https://doi.org/10.1016/S0010-4655(00)00048-5	journal	August 2000
The EvtGen particle decay simulation package Lange, David J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 462, Issue 1-2 https://doi.org/10.1016/S0168-9002(01)00089-4	journal	April 2001
The Belle detector Abashian, A.; Gotow, K.; Morgan, N. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 1 https://doi.org/10.1016/S0168-9002(01)02013-7	journal	February 2002
Electron identification in Belle Hanagaki, K.; Kakuno, H.; Ikeda, H. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 485, Issue 3 https://doi.org/10.1016/S0168-9002(01)02113-1	journal	June 2002
Muon identification in the Belle experiment at KEKB Abashian, A.; Abe, K.; Abe, K. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 491, Issue 1-2 https://doi.org/10.1016/S0168-9002(02)01164-6	journal	September 2002
Overview of the KEKB accelerators Kurokawa, S.; Kikutani, E. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 1 https://doi.org/10.1016/S0168-9002(02)01771-0	journal	February 2003
A detailed test of the CsI(Tℓ) calorimeter for BELLE with photon beams of energy between 20 MeV and 5.4 GeV Ikeda, H.; Satpathy, A.; Ahn, B. S. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 441, Issue 3 https://doi.org/10.1016/S0168-9002(99)00992-4	journal	March 2000
Anatomy and phenomenology of μ–τ lepton flavour violation in the MSSM Brignole, Andrea; Rossi, Anna Nuclear Physics B, Vol. 701, Issue 1-2 https://doi.org/10.1016/j.nuclphysb.2004.08.037	journal	November 2004
Physics achievements from the Belle experiment Brodzicka, J.; Browder, T.; Chang, P. Progress of Theoretical and Experimental Physics, Vol. 2012, Issue 1 https://doi.org/10.1093/ptep/pts072	journal	January 2012
New parametrization of the seesaw mechanism and applications in supersymmetric models Ellis, John; Hisano, Junji; Raidal, Martti Physical Review D, Vol. 66, Issue 11 https://doi.org/10.1103/PhysRevD.66.115013	journal	December 2002
Lepton flavor violation from supersymmetric grand unified theories: Where do we stand for MEG, PRISM/PRIME, and a super flavor factory Calibbi, L.; Faccia, A.; Masiero, A. Physical Review D, Vol. 74, Issue 11 https://doi.org/10.1103/PhysRevD.74.116002	journal	December 2006
Quantum Chromodynamics Test for Jets Farhi, Edward Physical Review Letters, Vol. 39, Issue 25 https://doi.org/10.1103/PhysRevLett.39.1587	journal	December 1977

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