Search for lepton-flavor-violating decays into a lepton and a vector meson using the full Belle data sample

N. Tsuzuki,K. Inami,I. Adachi,H. Aihara, D. M. Asner, H. Atmacan,T. Aushev,R. Ayad, V. Babu,Sw. Banerjee, P. Behera, K. Belous,J. Bennett, M. Bessner, B. Bhuyan, T. Bilka,D. Biswas,D. Bodrov,J. Borah,A. Bozek, M. Bracko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Cervenkov, M. -C. Chang, B. G. Cheon, K. Chilikin,H. E. Cho,K. Cho,S. -J. Cho,S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, J. Cochran, S. Das, N. Dash, G. De Nardo,G. De Pietro, R. Dhamija,F. Di Capua,Z. Dolezal,T. V. Dong, D. Dossett,S. Dubey,D. Epifanov,T. Ferber, D. Ferlewicz, B. G. Fulsom,V. Gaur,A. Giri, P. Goldenzweig, Y. Guan, K. Gudkova, X. Han,T. Hara,K. Hayasaka, H. Hayashii,M. T. Hedges, D. Herrmann,W. -S. Hou,C. -L. Hsu,T. Iijima,N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki,W. W. Jacobs, E. -J. Jang, S. Jia, Y. Jin, T. Kawasaki, C. Kiesling,C. H. Kim,D. Y. Kim,K. -H. Kim,Y. -K. Kim,K. Kinoshita, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan,P. Krokovny, M. Kumar,K. Kumara,A. Kuzmin,Y. -J. Kwon, S. C. Lee, J. Li, L. K. Li, Y. Li, J. Libby, K. Lieret, Y. -R. Lin, D. Liventsev, Y. Ma, A. Martini, M. Masuda, K. Matsuoka,D. Matvienko, S. K. Maurya, F. Meier,M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Nakao, Z. Natkaniec,A. Natochii,L. Nayak, M. Niiyama,N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin,G. Pakhlova,T. Pang, S. Pardi, H. Park, J. Park, S. -H. Park, A. Passeri,S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, A. Rostomyan,N. Rout,G. Russo,S. Sandilya,A. Sangal, L. Santelj, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior,W. Shan, M. Shapkin, C. Sharma, J. -G. Shiu, E. Solovieva, M. Staric, M. Sumihama, T. Sumiyoshi,M. Takizawa,U. Tamponi, K. Tanida, F. Tenchini, M. Uchida,T. Uglov, Y. Unno,S. Uno, P. Urquijo, Y. Ushiroda,S. E. Vahsen, G. Varner, A. Vinokurova, D. Wang, E. Wang, M. -Z. Wang,X. L. Wang,S. Watanuki, X. Xu,B. D. Yabsley, W. Yan, S. B. Yang, J. Yelton, Y. Yook, L. Yuan,Y. Zhai, V. Zhilichand,V. Zhukova

JOURNAL OF HIGH ENERGY PHYSICS（2023）

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Abstract

Charged-lepton-flavor-violation is predicted in several new physics scenarios. We update the analysis of tau lepton decays into a light charged lepton (l = e(+/-) or mu(+/-)) and a vector meson (V-0 = rho(0), phi, omega, K-*0, or (K) over bar (*0)) using 980 fb(-1) of data collected with the Belle detector at the KEKB collider. No significant excess of such signal events is observed, and thus 90% credibility level upper limits are set on the tau -> lV(0) branching fractions in the range of (1.7- 4.3) x 10(-8). These limits are improved by 30% on average from the previous results.

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Key words

e(+)-e(-) Experiments, Tau Physics

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