Measurement of B (Bs →dsX) with Bs semileptonic tagging

B. Wang, K. Kinoshita, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, C. Beleño, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. BračkoT. E. Browder, M. Campajola, L. Cao, D. Červenkov, A. Chen, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, F. Di Capua, S. Di Carlo, Z. DoleŽal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, Y. Guan, K. Hayasaka, H. Hayashii, W. S. Hou, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, C. Kiesling, D. Y. Kim, K. T. Kim, S. H. Kim, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, J. Y. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, J. Macnaughton, C. Macqueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, K. J. Nath, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, G. Pakhlova, B. Pal, T. Pang, S. Pardi, H. Park, S. H. Park, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, V. Popov, E. Prencipe, M. Prim, M. Ritter, A. Rostomyan, G. Russo, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, J. G. Shiu, A. Sokolov, E. Solovieva, M. Starič, J. F. Strube, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, T. Uglov, S. Uno, Y. Usov, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, C. H. Wang, M. Z. Wang, P. Wang, O. Werbycka, E. Won, S. B. Yang, H. Ye, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

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Abstract

We report the first direct measurement of the inclusive branching fraction B(Bs→DsX) via Bs tagging in e+e-→ (5S) events. Tagging is accomplished through a partial reconstruction of semileptonic decays Bs→DsXℓν, where X denotes unreconstructed additional hadrons or photons and ℓ is an electron or muon. With 121.4 fb-1 of data collected at the (5S) resonance by the Belle detector at the KEKB asymmetric-energy e+e- collider, we obtain B(Bs→DsX)=(60.2±5.8±2.3)%, where the first uncertainty is statistical and the second is systematic.

Original languageEnglish
Article number012004
JournalPhysical Review D
Volume105
Issue number1
DOIs
Publication statusPublished - 2022 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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