Search for the baryon number and lepton number violating decays τ- → Λπ- and τ- → Λ ¯ π- Belle II

I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw Banerjee, S. BansalM. Barrett, J. Baudot, A. Baur, A. Beaubien, F. Becherer, J. Becker, J. V. Bennett, F. U. Bernlochner, V. Bertacchi, M. Bertemes, E. Bertholet, M. Bessner, S. Bettarini, B. Bhuyan, F. Bianchi, L. Bierwirth, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, A. Boschetti, A. Bozek, P. Branchini, T. E. Browder, A. Budano, S. Bussino, Q. Campagna, M. Campajola, G. Casarosa, C. Cecchi, J. Cerasoli, M. C. Chang, R. Cheaib, P. Cheema, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, S. Choudhury, J. Cochran, L. Corona, J. X. Cui, E. De La Cruz-Burelo, S. A. De La Motte, G. De Nardo, G. De Pietro, R. De Sangro, M. Destefanis, S. Dey, R. Dhamija, A. Di Canto, F. Di Capua, J. Dingfelder, Z. DoleŽal, I. Domínguez Jiménez, T. V. Dong, M. Dorigo, K. Dort, D. Dossett, S. Dubey, G. Dujany, P. Ecker, D. Epifanov, J. Eppelt, P. Feichtinger, T. Ferber, T. Fillinger, C. Finck, G. Finocchiaro, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, A. Gabrielli, E. Ganiev, M. Garcia-Hernandez, G. Gaudino, V. Gaur, A. Gaz, A. Gellrich, G. Ghevondyan, D. Ghosh, H. Ghumaryan, G. Giakoustidis, R. Giordano, P. Gironella, A. Glazov, B. Gobbo, R. Godang, P. Goldenzweig, W. Gradl, E. Graziani, D. Greenwald, Z. Gruberová, K. Gudkova, I. Haide, S. Halder, K. Hara, C. Harris, H. Hayashii, S. Hazra, C. Hearty, M. T. Hedges, A. Heidelbach, I. Heredia De La Cruz, M. Hernández Villanueva, T. Higuchi, M. Hoek, M. Hohmann, R. Hoppe, P. Horak, C. L. Hsu, T. Humair, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, D. E. Jaffe, E. J. Jang, Q. P. Ji, S. Jia, Y. Jin, H. Junkerkalefeld, J. Kandra, K. H. Kang, G. Karyan, T. Kawasaki, F. Keil, C. Kiesling, D. Y. Kim, J. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Koga, S. Kohani, K. Kojima, A. Korobov, S. Korpar, E. Kovalenko, R. Kowalewski, P. KriŽan, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, S. Lacaprara, Y. T. Lai, K. Lalwani, T. Lam, L. Lanceri, J. S. Lange, M. Laurenza, K. Lautenbach, R. Leboucher, M. J. Lee, P. Leo, D. Levit, P. M. Lewis, C. Li, L. K. Li, W. Z. Li, Y. Li, Y. B. Li, J. Libby, J. Lin, M. H. Liu, Q. Y. Liu, Z. Q. Liu, D. Liventsev, S. Longo, T. Lueck, C. Lyu, Y. Ma, M. Maggiora, S. P. Maharana, R. Maiti, S. Maity, G. Mancinelli, R. Manfredi, E. Manoni, M. Mantovano, D. Marcantonio, S. Marcello, C. Marinas, C. Martellini, A. Martens, A. Martini, T. Martinov, L. Massaccesi, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, J. A. McKenna, R. Mehta, F. Meier, M. Merola, C. Miller, M. Mirra, S. Mitra, S. Mondal, S. Moneta, H. G. Moser, R. Mussa, I. Nakamura, M. Nakao, Y. Nakazawa, M. Naruki, D. Narwal, Z. Natkaniec, A. Natochii, M. Nayak, G. Nazaryan, M. Neu, C. Niebuhr, S. Nishida, S. Ogawa, H. Ono, P. Pakhlov, E. Paoloni, S. Pardi, J. Park, K. Park, S. H. Park, B. Paschen, A. Passeri, S. Patra, T. K. Pedlar, R. Peschke, R. Pestotnik, M. Piccolo, L. E. Piilonen, P. L.M. Podesta-Lerma, T. Podobnik, S. Pokharel, C. Praz, S. Prell, E. Prencipe, M. T. Prim, H. Purwar, G. Raeuber, S. Raiz, N. Rauls, M. Reif, S. Reiter, M. Remnev, L. Reuter, I. Ripp-Baudot, G. Rizzo, J. M. Roney, A. Rostomyan, N. Rout, S. Sandilya, L. Santelj, V. Savinov, B. Scavino, M. Schnepf, C. Schwanda, Y. Seino, A. Selce, K. Senyo, J. Serrano, M. E. Sevior, C. Sfienti, W. Shan, C. Sharma, C. P. Shen, X. D. Shi, T. Shillington, T. Shimasaki, J. G. Shiu, D. Shtol, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, J. Skorupa, R. J. Sobie, M. Sobotzik, A. Soffer, A. Sokolov, E. Solovieva, W. Song, S. Spataro, B. Spruck, M. Starič, P. Stavroulakis, S. Stefkova, R. Stroili, Y. Sue, M. Sumihama, K. Sumisawa, W. Sutcliffe, N. Suwonjandee, H. Svidras, M. Takahashi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, O. Tittel, R. Tiwary, D. Tonelli, E. Torassa, K. Trabelsi, I. Ueda, K. Unger, Y. Unno, K. Uno, S. Uno, P. Urquijo, S. E. Vahsen, R. Van Tonder, K. E. Varvell, M. Veronesi, V. S. Vismaya, L. Vitale, V. Vobbilisetti, R. Volpe, M. Wakai, S. Wallner, E. Wang, M. Z. Wang, Z. Wang, A. Warburton, S. Watanuki, C. Wessel, E. Won, X. P. Xu, B. D. Yabsley, S. Yamada, W. Yan, S. B. Yang, J. Yelton, J. H. Yin, K. Yoshihara, C. Z. Yuan, L. Zani, B. Zhang, J. S. Zhou, Q. D. Zhou, V. I. Zhukova, R. Žlebčík

Research output: Contribution to journalArticlepeer-review

Abstract

We present a search for the baryon number B and lepton number L violating decays τ-→Λπ- and τ-→Λ¯π- produced from the e+e-→τ+τ- process, using a 364 fb-1 data sample collected by the Belle II experiment at the SuperKEKB collider. No evidence of signal is found in either decay mode, which have |Δ(B-L)| equal to 2 and 0, respectively. Upper limits at 90% credibility level on the branching fractions of τ-→Λπ- and τ-→Λ¯π- are determined to be 4.7×10-8 and 4.3×10-8, respectively.

Original languageEnglish
Article number112003
JournalPhysical Review D
Volume110
Issue number11
DOIs
StatePublished - 1 Dec 2024

Funding

FundersFunder number
Narodowe Centrum Nauki
Institut National de Physique Nucléaire et de Physique des Particules
Korea Research Environment Open Network
Akademi Sains Malaysia
Universiti Malaya
National Institute of Informatics
Korea Institute of Science and Technology Information
Bundesministerium für Bildung, Wissenschaft und Forschung
Instituto Nazionale di Fisica Nucleare
Thailand Center of Excellence in Physics
Department of Science and Technology, Ministry of Science and Technology, India
Centre National de la Recherche Scientifique
Max-Planck-Gesellschaft
Bundesministerium für Bildung und Forschung
Ministry of Education and Science of Ukraine
Helmholtz-Gemeinschaft
Canarie
Deutsche Forschungsgemeinschaft
Ministry of Education and Science of the Russian Federation
Natural Sciences and Engineering Research Council of Canada
National Science and Technology Council
TUBITAK ULAKBIM
Ministry of Education
Compute Canada
European Research Council
Ministerstwo Edukacji i Nauki
GLORIAD
Alexander von Humboldt-Stiftung
Ministry of Education, Culture, Sports, Science and Technology
Department of Atomic Energy, Government of IndiaRTI 4002
Vietnam Academy of Science and TechnologyDL0000.02/24-25, NVCC.05.12/22-23
Natural Science Foundation of Shandong ProvinceZR2022JQ02
U.S. Department of Energy and ResearchDE-SC0010007, DE-SC0010118, DE-AC06-76RLO1830, DE-SC0010504, DE-SC0012704, DE-SC0021616, DE-SC0010073, DE-SC0011784, DE-SC0021274, DE-SC0022350, DE-SC0019230, DE-SC0023470, DE-SC0009824, DE-SC0007983, DE-SC0009973
National Natural Science Foundation of China and Research12175041, 12405102, 12135005, 11761141009, 11975076, 11575017, 12150004, 12161141008, 11705209
Horizon 2020700525, 101026516
Australian Research CouncilDP210101900, DP210102831, DP200101792, DE220100462, LE210100098, LE230100085
Horizon 2020 Framework Programme947006
University of Tabuk ResearchS-0280-1439, S-0256-1438
Generalitat Valenciana, SpainCIDEGENT/2018/020
Higher Education and Science Committee of the Republic of Armenia23LCG-1C011
National Science FoundationPHY-2111604, PHY-1913789
Austrian Science FundP 31361-N36
Israel Ministry of Science3-16543
Agencia Estatal de InvestigaciónRYC2020-029875-I
Horizon 2020 ERC-Consolidator819127
National Research Foundation of Ukraine2020.02/0257
Israel Science Foundation2476/17
National Research Foundation of Korea2022R1A2C1003993, 2016R1D1A1B02012900, 2018R1A2B3003643, 2021R1A6A1A03043957, 2021R1F1A1064008, RS-2022-00197659, 2021R1F1A1060423, 2019R1I1A3A01058933, 2018R1A6A1A06024970
Ministry of Higher Education, MalaysiaFOINS-296, CB-254409, CB-236394, CB-180023, CB-221329
Horizon 2020 ERC-Advanced267104, 884719
United States-Israel Binational Science Foundation2016113
Horizon 2020 Marie Sklodowska-Curie822070
Grantová Agentura České Republiky22-18469S
SEP-CINVESTAV237
UPES SEEDD-SOE/20062022/06, D-SEED-INFRA/17052023/01
National Key Research and Development Program of China2022YFA1601903
Seventh FrameworkPIEF-GA-2013-622527
Agence Nationale de la RechercheANR-21-CE31-0009
Slovenian Research Agency and ResearchJ1-9124, P1-0135
Japan Society for the Promotion of Science18H05226, 18K03621, 26400255, 16H06492, 22H00144, 19H00682, 20H05850, 26220706, 17H01133, 22K21347, 16K05323, 20H05858, 16H03993, 16H03968, 17H05405, 23H05433, 22K14056, 18H03710

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