首页|Search for the lepton-flavor-violating $Ï^{-} \rightarrow e^{\mp} \ell^{\pm} \ell^{\mp}$ decays at Belle II

Search for the lepton-flavor-violating $Ï^{-} \rightarrow e^{\mp} \ell^{\pm} \ell^{\mp}$ decays at Belle II

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英文摘要

We present the result of a search for the charged-lepton-flavor violating decays $Ï^- \rightarrow e^\mp \ell^\pm \ell^-$, where $\ell$ is a muon or an electron, using a data sample with an integrated luminosity of 428 fb$^{-1}$ recorded by the Belle II experiment at the SuperKEKB $e^+e^-$ collider. The selection of $e^+e^- \toÏ^+Ï^-$ events containing a signal candidate is based on an inclusive-tagging reconstruction and on a boosted decision tree to suppress background. Upper limits on the branching fractions between 1.3 and 2.5 $\times 10^{-8}$ are set at the 90% confidence level. These results are the most stringent bounds to date for four of the modes.

作者：E. Won、S. Uno、D. E. Jaffe、S. Jia、Y. Jin、W. W. Jacobs、P. Jackson、D. Jacobi、E. -J. Jang、Q. P. Ji、K. K. Joo、A. Johnson、K. Kinoshita、P. Kodyš、T. Koga、S. Kohani、K. Kojima、A. Korobov、S. Korpar、E. Kovalenko、R. Kowalewski、P. Križan、P. Krokovny、T. Kuhr、Y. Kulii、D. Kumar、J. Kumar、R. Kumar、K. Kumara、T. Kunigo、A. Kuzmin、Y. -J. Kwon、S. Lacaprara、K. Lalwani、T. Lam、L. Lanceri、J. S. Lange、T. S. Lau、M. Laurenza、R. Leboucher、F. R. Le Diberder、M. J. Lee、C. Lemettais、P. Leo、P. M. Lewis、H. -J. Li、L. K. Li、Q. M. Li、S. X. Li、W. Z. Li、Y. Li、Y. B. Li、Y. P. Liao、J. Libby、J. Lin、S. Lin、V. Lisovskyi、M. H. Liu、Q. Y. Liu、Y. Liu、Z. Q. Liu、D. Liventsev、S. Longo、T. Lueck、C. Lyu、Y. Ma、C. Madaan、M. Maggiora、S. P. Maharana、R. Maiti、G. Mancinelli、R. Manfredi、E. Manoni、M. Mantovano、D. Marcantonio、S. Marcello、C. Marinas、C. Martellini、A. Martens、T. Martinov、D. Matvienko、S. K. Maurya、M. Maushart、L. Massaccesi、M. Masuda、A. L. Moreira de Carvalho、A. Prakash、C. Praz、S. Prell、E. Prencipe、M. T. Prim、S. Privalov、H. Purwar、P. Rados、G. Raeuber、S. Raiz、V. Raj、K. Ravindran、J. U. Rehman、M. Reif、S. Reiter、M. Remnev、L. Reuter、D. Ricalde Herrmann、I. Ripp-Baudot、G. Rizzo、S. H. Robertson、J. M. Roney、A. Rostomyan、N. Rout、L. Salutari、D. A. Sanders、S. Sandilya、L. Santelj、V. Savinov、B. Scavino、J. Schmitz、S. Schneider、M. Schnepf、K. Schoenning、C. Schwanda、A. J. Schwartz、Y. Seino、A. Selce、K. Senyo、J. Serrano、H. -G. Moser、I. Nakamura、M. Nakao、Y. Nakazawa、M. Naruki、Z. Natkaniec、A. Natochii、M. Nayak、G. Nazaryan、M. Neu、S. Nishida、S. Ogawa、R. Okubo、H. Ono、Y. Onuki、G. Pakhlova、A. Panta、S. Pardi、K. Parham、H. Park、J. Park、K. Park、S. -H. Park、B. Paschen、A. Passeri、S. Patra、S. Paul、T. K. Pedlar、M. E. Sevior、C. Sfienti、W. Shan、G. Sharma、X. D. Shi、T. Shillington、T. Shimasaki、J. -G. Shiu、D. Shtol、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、D. Meleshko、M. Merola、C. Miller、M. Mirra、S. Mitra、K. Miyabayashi、H. Miyake、P. Stavroulakis、S. Stefkova、L. Stoetzer、R. Stroili、Y. Sue、M. Sumihama、K. Sumisawa、N. Suwonjandee、H. Svidras、M. Takahashi、M. Takizawa、U. Tamponi、M. Veronesi、A. Vinokurova、V. S. Vismaya、L. Vitale、V. Vobbilisetti、R. Volpe、A. Vossen、M. Wakai、S. Wallner、M. -Z. Wang、X. L. Wang、A. Warburton、M. Watanabe、S. Watanuki、C. Wessel、X. P. Xu、B. D. Yabsley、S. Yamada、W. Yan、W. C. Yan、S. B. Yang、J. Yelton、K. Yi、J. H. Yin、K. Yoshihara、C. Z. Yuan、J. Yuan、L. Zani、F. Zeng、M. Zeyrek、B. Zhang、V. Zhilich、J. S. Zhou、Q. D. Zhou、L. Zhu、R. Žlebčík、R. de Sangro、M. Destefanis、S. Dey、A. Di Canto、F. Di Capua、J. Dingfelder、Z. Doležal、I. Domínguez Jiménez、T. V. Dong、X. Dong、M. Dorigo、K. Dugic、G. Dujany、P. Ecker、D. Epifanov、J. Eppelt、R. Farkas、P. Feichtinger、T. Ferber、T. Fillinger、C. Finck、G. Finocchiaro、A. Fodor、F. Forti、A. Frey、B. G. Fulsom、A. Gabrielli、A. Gale、E. Ganiev、M. Garcia-Hernandez、R. Garg、G. Gaudino、V. Gaur、V. Gautam、A. Gaz、A. Gellrich、G. Ghevondyan、D. Ghosh、H. Ghumaryan、G. Giakoustidis、R. Giordano、A. Giri、P. Gironella Gironell、F. Bianchi、T. Bilka、D. Biswas、A. Bobrov、D. Bodrov、A. Bondar、G. Bonvicini、J. Borah、A. Boschetti、A. Bozek、M. Bračko、P. Branchini、N. Brenny、T. E. Browder、A. Budano、S. Bussino、Q. Campagna、M. Campajola、L. Cao、G. Casarosa、C. Cecchi、M. -C. Chang、R. Cheaib、P. Cheema、C. Chen、L. Chen、B. G. Cheon、K. Chilikin、J. Chin、K. Chirapatpimol、H. -E. Cho、K. Cho、S. -J. Cho、S. -K. Choi、S. Choudhury、J. Cochran、I. Consigny、L. Corona、J. X. Cui、E. De La Cruz-Burelo、S. A. De La Motte、G. De Nardo、G. De Pietro、Belle II Collaboration、I. Adachi、L. Aggarwal、H. Ahmed、Y. Ahn、H. Aihara、N. Akopov、S. Alghamdi、M. Alhakami、A. Aloisio、N. Althubiti、K. Amos、M. Angelsmark、N. Anh Ky、C. Antonioli、D. M. Asner、H. Atmacan、V. Aushev、M. Aversano、R. Ayad、V. Babu、H. Bae、N. K. Baghel、S. Bahinipati、P. Bambade、Sw. Banerjee、S. Bansal、M. Barrett、M. Bartl、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、V. Bhardwaj、B. Bhuyan、H. Junkerkalefeld、D. Kalita、A. B. Kaliyar、J. Kandra、K. H. Kang、G. Karyan、T. Kawasaki、F. Keil、C. Ketter、M. Khan、C. Kiesling、C. -H. Kim、D. Y. Kim、J. -Y. Kim、K. -H. Kim、Y. J. Kim、Y. -K. Kim、H. Kindo、A. Martini、J. A. McKenna、R. Mehta、F. Meier、R. Mizuk、K. Tanida、F. Tenchini、A. Thaller、O. Tittel、R. Tiwary、E. Torassa、K. Trabelsi、F. F. Trantou、I. Tsaklidis、I. Ueda、T. Uglov、K. Unger、Y. Unno、K. Uno、P. Urquijo、Y. Ushiroda、S. E. Vahsen、R. van Tonder、K. E. Varvell、A. Glazov、B. Gobbo、R. Godang、O. Gogota、P. Goldenzweig、W. Gradl、E. Graziani、D. Greenwald、Z. Gruberová、Y. Guan、K. Gudkova、I. Haide、Y. Han、T. Hara、C. Harris、K. Hayasaka、H. Hayashii、S. Hazra、C. Hearty、M. T. Hedges、A. Heidelbach、G. Heine、I. Heredia de la Cruz、M. Hernández Villanueva、T. Higuchi、M. Hoek、M. Hohmann、R. Hoppe、P. Horak、C. -L. Hsu、T. Iijima、K. Inami、G. Inguglia、N. Ipsita、A. Ishikawa、R. Itoh、M. Iwasaki、I. Peruzzi、R. Peschke、R. Pestotnik、M. Piccolo、L. E. Piilonen、P. L. M. Podesta-Lerma、T. Podobnik、S. Pokharel、G. B. Mohanty、S. Mondal、S. Moneta

作者单位：

学科分类：物理学

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Moneta.Search for the lepton-flavor-violating $Ï^{-} \rightarrow e^{\mp} \ell^{\pm} \ell^{\mp}$ decays at Belle II[EB/OL].(2025-07-24)[2025-08-10].https://arxiv.org/abs/2507.18236.点此复制

Search for the lepton-flavor-violating $Ï^{-} \rightarrow e^{\mp} \ell^{\pm} \ell^{\mp}$ decays at Belle II