학술논문

Measurement of ${\mathcal B}$($B_s \rightarrow D_s X$) with $B_s$ Semileptonic Tagging
Document Type
Working Paper
Author
Wang, B.Kinoshita, K.Aihara, H.Asner, D. M.Aushev, T.Ayad, R.Babu, V.Badhrees, I.Bakich, A. M.Behera, P.Beleño, C.Bennett, J.Bessner, M.Bhardwaj, V.Bilka, T.Biswal, J.Bobrov, A.Bonvicini, G.Bozek, A.Bračko, M.Browder, T. E.Campajola, M.Cao, L.Červenkov, D.Chen, A.Chilikin, K.Cho, H. E.Cho, K.Choi, S. -K.Choi, Y.Cinabro, D.Cunliffe, S.Dash, N.Di Capua, F.Di Carlo, S.Doležal, Z.Eidelman, S.Epifanov, D.Fast, J. E.Ferber, T.Fulsom, B. G.Garg, R.Gaur, V.Garmash, A.Giri, A.Goldenzweig, P.Guan, Y.Hayashii, H.Hou, W. -S.Inami, K.Ishikawa, A.Iwasaki, M.Iwasaki, Y.Jia, S.Jin, Y.Joffe, D.Joo, K. K.Kaliyar, A. B.Kang, K. H.Karyan, G.Kiesling, C.Kim, D. Y.Kim, K. T.Kim, S. H.Kodyš, P.Korpar, S.Kotchetkov, D.Križan, P.Kroeger, R.Krokovny, P.Kuhr, T.Kuzmin, A.Kwon, Y. -J.Lange, J. S.Lee, I. S.Lee, J. Y.Lee, S. C.Li, L. K.Li, Y. B.Gioi, L. LiLibby, J.Lieret, K.Liventsev, D.Luo, T.MacNaughton, J.MacQueen, C.Masuda, M.Matsuda, T.Matvienko, D.Merola, M.Mizuk, R.Mohanty, G. B.Mussa, R.Nakao, M.Nath, K. J.Nayak, M.Nisar, N. K.Nishida, S.Nishimura, K.Ogawa, S.Ono, H.Onuki, Y.Pakhlova, G.Pal, B.Pang, T.Pardi, S.Park, H.Park, S. -H.Pedlar, T. K.Pestotnik, R.Piilonen, L. E.Popov, V.Prencipe, E.Ritter, M.Rostomyan, A.Russo, G.Sandilya, S.Santelj, L.Sanuki, T.Savinov, V.Schneider, O.Schnell, G.Schwanda, C.Schwartz, A. J.Seino, Y.Senyo, K.Sevior, M. E.Shebalin, V.Shiu, J. -G.Sokolov, A.Solovieva, E.Starič, M.Strube, J. F.Sumiyoshi, T.Takizawa, M.Tanida, K.Tenchini, F.Uglov, T.Uno, S.Usov, Y.Van Tonder, R.Varner, G.Vinokurova, A.Waheed, E.Wang, C. H.Wang, M. -Z.Wang, P.Werbycka, O.Won, E.Yang, S. B.Ye, H.Yusa, Y.Zhang, Z. P.Zhilich, V.Zhukova, V.Zhulanov, V.
Source
Phys. Rev. D 105, 012004 (2022)
Subject
High Energy Physics - Experiment
Language
Abstract
We report the first direct measurement of the inclusive branching fraction ${\mathcal B}(B_s \rightarrow D_s X)$ via $B_s$ tagging in $e^+e^-\to\Upsilon$(5S) events. Tagging is accomplished through a partial reconstruction of semileptonic decays $B_s \rightarrow D_s X \ell \nu$, where $X$ denotes unreconstructed additional hadrons or photons and $\ell$ is an electron or muon. With 121.4 fb$^{-1}$ of data collected at the $\Upsilon$(5S) resonance by the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider, we obtain ${\mathcal B}(B_s \rightarrow D_s X)$ = $(60.2 \pm 5.8 \pm 2.3)$\%, where the first uncertainty is statistical and the second is systematic.