Search for charged lepton flavor violating decays of ϒ (1S)

A bstract We present a search for the charged lepton-flavor-violating decays ϒ(1 S ) → ℓ ± ℓ ′ ∓ and radiative charged lepton-flavour-violating decays ϒ(1 S ) → γ ℓ ± ℓ ′ ∓ [ ℓ , ℓ ′ = e, μ, τ ] using the 158 million ϒ(2 S ) sample collected by the Belle detector at the KEKB collider. This search us...

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Veröffentlicht in:	JHEP 2022-05, Vol.2022 (5), p.95-21, Article 95
Hauptverfasser:	Adachi, I., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Browder, T. E., Budano, A., Červenkov, D., Chang, M.-C., Chang, P., Cheon, B. G., Cho, S.-J., Choudhury, S., Di Capua, F., Fulsom, B. G., Garg, R., Goldenzweig, P., Graziani, E., Hedges, M. T., Hernandez, M., Villanueva, Hou, W.-S., Hsu, C.-L., Itoh, R., Jacobs, W. W., Karyan, G., Kawasaki, T., Kim, C. H., Kim, K.-H., Korobov, A., Kovalenko, E., Kuhr, T., Kuzmin, A., Lam, T., Lee, S. C., Li, C. H., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Martini, A., Matvienko, D., Metzner, F., Miyabayashi, K., Mizuk, R., Nayak, L., Nayak, M., Nisar, N. K., Ogawa, S., Oskin, P., Pakhlov, P., Park, H., Pestotnik, R., Podobnik, T., Popov, V., Prencipe, E., Prim, M. T., Rostomyan, A., Russo, G., Sandilya, S., Savinov, V., Schwanda, C., Seino, Y., Sevior, M. E., Shapkin, M., Sharma, C., Shwartz, B., Simon, F., Stottler, Z. S., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tenchini, F., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Van Tonder, R., Varner, G., Vossen, A., Wang, C. H., Wang, D., Wang, E., Ye, H., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhukova, V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Classical and Quantum Gravitation Confidence intervals Decay e +-e − Experiments e+-e Elementary Particles experiments Flavors High energy physics High Energy Physics - Experiment INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY Laboratories Leptons Mathematics Mesons Nuclear physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Experimental Physics Relativity Theory Science education Searching String Theory
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Zusammenfassung:	A bstract We present a search for the charged lepton-flavor-violating decays ϒ(1 S ) → ℓ ± ℓ ′ ∓ and radiative charged lepton-flavour-violating decays ϒ(1 S ) → γ ℓ ± ℓ ′ ∓ [ ℓ , ℓ ′ = e, μ, τ ] using the 158 million ϒ(2 S ) sample collected by the Belle detector at the KEKB collider. This search uses ϒ(1 S ) mesons produced in ϒ(2 S ) → π + π − ϒ(1 S ) transitions. We do not find any significant signal, so we provide upper limits on the branching fractions at the 90% confidence level.
ISSN:	1029-8479 1029-8479
DOI:	10.1007/JHEP05(2022)095