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Luo, T.; Adachi, I.; Asner, D. M.; Atmacan, H.; Bahinipati, S.; Behera, P.; Belous, K.; Bernlochner, F.; Bilka, T.; Biswal, J.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chang, M.-C.; Chang, P.; Chen, A.; Cho, H. E.; Cho, S.-J.; Choi, Y.; Cinabro, D.; Cunliffe, S.; Czank, T.; De Pietro, G.; Di Capua, F.; Dingfelder, J.; Doležal, Z.; Dubey, S.; Ferber, T.; Garg, R.; Gabyshev, N.; Giri, A.; Goldenzweig, P.; Gudkova, K.; Hara, T.; Hayasaka, K.; Hou, W.-S.; Inami, K.; Ishikawa, A.; Itoh, R.; Jacobs, W. W.; Jang, E.-J.; Jin, Y.; Joo, K. K.; Kichimi, H.; Kim, D. Y.; Kim, S. H.; Kim, Y.-K.; Kodyš, P.; Kovalenko, E.; Kroeger, R.; Kuhr, T.; Kulasiri, R.; Kumar, M.; Kumara, K.; Laurenza, M.; Li, L. K.; Li, Y. B.; Li Gioi, L.; Libby, J.; Lieret, K.; MacQueen, C.; Matsuda, T.; Matvienko, D.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Nakao, M.; Nayak, L.; Niiyama, M.; Nishida, S.; Nishimura, K.; Ogawa, S.; Ono, H.; Onuki, Y.; Pardi, S.; Paul, S.; Piilonen, L. E.; Russo, G.; Sahoo, D.; Santelj, L.; Sanuki, T.; Sevior, M. E.; Sharma, C.; Shiu, J.-G.; Solovieva, E.; Starič, M.; Sumihama, M.; Sumiyoshi, T.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Unno, Y.; Varner, G.; Varvell, K. E.; Waheed, E.; Wang, E.; Yabsley, B. D.; Yan, W.; Yang, S. B.
Physical review. D, 07/2023, Volume: 108, Issue: 1Journal Article
This paper presents a search for the rare flavor-changing neutral current process B0→K*0τ+τ- using data taken with the Belle detector at the KEKB asymmetric energy $e^+$$e^-$ collider. The analysis is based on the entire $\Upsilon$$(4S)$ resonance data sample of $711$ $\mathrm{fb}^{-1}$, corresponding to $772 × 10^6$$B$$\bar{B}$ pairs. In our search we fully reconstruct the companion $B$ meson produced in the process $e^+$$e^-$ → $\Upsilon$$(4S)$ → $B$$\bar{B}$ from its hadronic decay modes and look for the decay B0→K*0τ+τ- in the rest of the event. No evidence for a signal is found. We report an upper limit on the branching fraction $\mathscr{B}$(B0→K*0τ+τ-) < $3.1 × 10^{-3}$ at 90% confidence level. This is the first direct limit on $\mathscr{B}$(B0→K*0τ+τ-).
