We present a search for the lepton-flavor-violating decays B0s→ℓ∓τ±, where ℓ=e,μ, using the full data sample of 121 fb−1 collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We use B0sB¯¯¯¯0s events in which one B0s meson is reconstructed in a semileptonic decay mode and the other in the signal mode. We find no evidence for B0s→ℓ∓τ± decays and set upper limits on their branching fractions at 90% confidence level as B(B0s→e∓τ±)<14×10−4 and B(B0s→μ∓τ±)<7.3×10−4. Our result represents the first upper limit on the B0s→e∓τ± decay rate.

Search for B0s→ℓ∓τ± with the Semi-leptonic Tagging Method at Belle

F. Tenchini;
2023-01-01

Abstract

We present a search for the lepton-flavor-violating decays B0s→ℓ∓τ±, where ℓ=e,μ, using the full data sample of 121 fb−1 collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We use B0sB¯¯¯¯0s events in which one B0s meson is reconstructed in a semileptonic decay mode and the other in the signal mode. We find no evidence for B0s→ℓ∓τ± decays and set upper limits on their branching fractions at 90% confidence level as B(B0s→e∓τ±)<14×10−4 and B(B0s→μ∓τ±)<7.3×10−4. Our result represents the first upper limit on the B0s→e∓τ± decay rate.
2023
Nayak, L.; Nishida, S.; Giri, A.; Adachi, I.; Aihara, H.; Asner, D. M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Bahinipati, S.; Banerjee, S.; Bauer, M.; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhuyan, B.; Biswas, D.; Bodrov, D.; Borah, J.; Bozek, A.; Bra??ko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; ??ervenkov, D.; Chang, M. -C.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cochran, J.; Das, S.; Dash, N.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Dole??al, Z.; Dong, T. V.; Dossett, D.; Dubey, S.; Epifanov, D.; Ferber, T.; Ferlewicz, D.; Fulsom, B. G.; Garg, R.; Gaur, V.; Goldenzweig, P.; Graziani, E.; Gu, T.; Guan, Y.; Halder, S.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Herrmann, D.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jang, E. -J.; Jia, S.; Jin, Y.; Joo, K. K.; Kaliyar, A. B.; Kawasaki, T.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kinoshita, K.; Kody??, P.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Kri??an, P.; Krokovny, P.; Kuhr, T.; Kumar, M.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y. -J.; Lee, S. C.; Li, J.; Li, L. K.; Li, Y.; Libby, J.; Lieret, K.; Lin, Y. -R.; Liventsev, D.; Luo, T.; Ma, Y.; Masuda, M.; Matsuda, T.; Maurya, S. K.; Meier, F.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Nakamura, I.; Nakao, M.; Natkaniec, Z.; Natochii, A.; Nisar, N. K.; Ogawa, S.; Ono, H.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pang, T.; Pardi, S.; Park, J.; Park, S. -H.; Passeri, A.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Rostomyan, A.; Rout, N.; Russo, G.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Sharma, C.; Shiu, J. -G.; Sibidanov, A.; Solovieva, E.; Stari??, M.; Sumihama, M.; Sumiyoshi, T.; Takizawa, M.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Unno, Y.; Uno, K.; Uno, S.; Urquijo, P.; Vahsen, S. E.; Varner, G.; Varvell, K. E.; Vinokurova, A.; Wang, D.; Wang, M. -Z.; Watanuki, S.; Won, E.; Yabsley, B. D.; Yan, W.; Yelton, J.; Yook, Y.; Yuan, C. Z.; Yuan, L.; Yusa, Y.; Zhai, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1216622
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