Semi-inclusive studies of semileptonic $B_s$ decays at Belle
| Popis: | We present an analysis of the semi-inclusive decays $B_s \to D_s^- X \ell^+ \nu$ and $B_s \to D_s^{*-} X \ell^+ \nu$, where $X$ denotes a final state that may consist of additional hadrons or photons and $\ell$ is an electron or muon. The studied $B_s$ decays are contained in the $121.4~{\rm fb}^{-1}$ $\Upsilon(5S)$ data sample collected by the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The branching fractions of the decays are measured to be $\mathcal{B}(B_s \to D_s^- X \ell^+ \nu) = [8.2 \pm 0.2 (\text{stat}) \pm 0.6 (\text{syst}) \pm 1.4 (\text{ext})]\%$ and $\mathcal{B}(B_s \to D_s^{*-} X \ell^+ \nu) = [5.4 \pm 0.4 (\text{stat}) \pm 0.4 (\text{syst}) \pm 0.9 (\text{ext})]\%$, where the first two uncertainties are statistical and systematic and the last is due to external parameters. The measurement also provides an estimate of the $B_s^{(*)}\bar{B}_s^{(*)}$ production cross-section, $\sigma(e^+e^- \to B_s^{(*)}\bar{B}_s^{(*)}) = (53.8 \pm 1.4 (\text{stat}) \pm 4.0 (\text{syst}) \pm 3.4 (\text{ext}))\,{\rm pb}$, at the center-of-mass energy $\sqrt{s} = 10.86\,{\rm GeV}$. Comment: 13 pages, 2 figures, submitted to Phys. Rev. D |
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| Jazyk: | English |
| Přístupová URL adresa: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a00dd7fa228c496154c0ea13e32af6df http://arxiv.org/abs/1504.02004 |
| Rights: | OPEN |
| Přírůstkové číslo: | edsair.doi.dedup.....a00dd7fa228c496154c0ea13e32af6df |
| Autor: | T. Sumiyoshi, T. Sanuki, H. Farhat, M. Uchida, M. C. Chang, L. E. Piilonen, S. Yashchenko, Y. Watanabe, A. Abdesselam, T. Julius, Y. Iwasaki, Y. J. Kwon, M. Shapkin, V. Chobanova, P. Lukin, B. R. Ko, J. G. Shiu, J. Dalseno, O. Schneider, A. Drutskoy, G. S. Varner, C. Pulvermacher, A. M. Bakich, Z. Natkaniec, D. Liventsev, J. Libby, V. Gaur, E. Kato, K. Chilikin, Z. Doležal, Yuki Sato, K. Trabelsi, X. L. Wang, Vladimir Zhulanov, N. Gabyshev, D. Červenkov, W. S. Hou, V. Vorobyev, M. E. Sevior, I. S. Lee, R. Glattauer, T. K. Pedlar, A. Moll, C. P. Shen, Byung Gu Cheon, P. Goldenzweig, S. Nishida, T. E. Browder, A. Bobrov, P. Wang, H. Hayashii, Phillip Urquijo, M. Ritter, M. N. Wagner, B. Golob, K. T. Kim, T. Aushev, H. K. Moon, Jochen Dingfelder, Yang Li, B. G. Fulsom, J. Hasenbusch, V. Savinov, Y. Choi, R. Gillard, J. S. Lange, S. Ganguly, L. Santelj, R. Pestotnik, T. Ferber, D. Cinabro, Y. Sakai, D. Semmler, Y. M. Goh, O. Frost, Sunmin Ryu, T. Nozaki, D. H. Lee, Christoph Schwanda, K. Senyo, L. Pesántez, M. Huschle, G. B. Mohanty, Samo Stanič, E. Won, S. Uno, T. Hara, R. Mizuk, M. J. Kim, A. Rostomyan, G. Bonvicini, Y. Usov, Hitoshi Yamamoto, M. Sumihama, M. Starič, P. Vanhoefer, V. Chekelian, C. Oswald, Marko Petrič, A. Vinokurova, Jung-Hyun Kim, C. Kiesling, Toru Iijima, T. Kawasaki, T. Kumita, R. Itoh, H. J. Hyun, S. H. Kim, P. Krokovny, K. M. Williams, Z. P. Zhang, K. H. Kang, K. Cho, T. A. Shibata, E. Nakano, H. Miyata, M. Bračko, M. Z. Wang, K. Kinoshita, U. Tamponi, A. Chen, D. Matvienko, P. Pakhlov, P. Kapusta, S. Sandilya, S.I. Eidelman, S. Okuno, D. M. Asner, Samo Korpar, R. Ayad, E. Ribežl, K. Hayasaka, H. Park, A. Bozek, Y. Teramoto, Z. Drásal, C. Van Hulse, D. Y. Kim, Dipanwita Dutta, I. Adachi, J. B. Kim, M. Nayak, T. Nanut, Y. S. Sohn, V.N. Zhilich, G. Schnell, I. Jaegle, I. Badhrees, H. Nakazawa, O. Grzymkowska, C. H. Wang, A. Zupanc, X. H. He, Hiroaki Aihara, J. Stypula, T. Kuhr, D. Getzkow, G. Pakhlova, L. Li Gioi, A. Garmash, Yoshinobu Unno, Peter Kodys, A.L. Sibidanov, S. Al Said, V. Babu, Yongsun Kim, V.E. Shebalin, E. Solovieva, A. Vossen, O. Seon, Frank Simon, V. Bhardwaj, M. Rozanska, A. Ishikawa, M. Nakao, C. W. Park, P. Križan, James E. Fast, Y. Yook |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
electron
Nuclear and High Energy Physics High Energy Physics::Lattice Hadron Analytical chemistry FOS: Physical sciences BELLE Upsilon(10870) 01 natural sciences High Energy Physics - Experiment B/s --> D/s lepton neutrino High Energy Physics - Experiment (hep-ex) KEK-B KEKB muon 0103 physical sciences ddc:530 K+ K Nuclear Experiment 010306 general physics 10.86 GeV-cms decay [B/s] Physics Muon 010308 nuclear & particles physics photon High Energy Physics::Phenomenology semi-inclusive reaction branching ratio [B/s] High Energy Physics::Experiment hadron Atomic physics statistical experimental results |
| Zdroj: | Physical review / D 92(7), 072013 (2015). doi:10.1103/PhysRevD.92.072013 |
| Popis: | We present an analysis of the semi-inclusive decays $B_s \to D_s^- X \ell^+ \nu$ and $B_s \to D_s^{*-} X \ell^+ \nu$, where $X$ denotes a final state that may consist of additional hadrons or photons and $\ell$ is an electron or muon. The studied $B_s$ decays are contained in the $121.4~{\rm fb}^{-1}$ $\Upsilon(5S)$ data sample collected by the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The branching fractions of the decays are measured to be $\mathcal{B}(B_s \to D_s^- X \ell^+ \nu) = [8.2 \pm 0.2 (\text{stat}) \pm 0.6 (\text{syst}) \pm 1.4 (\text{ext})]\%$ and $\mathcal{B}(B_s \to D_s^{*-} X \ell^+ \nu) = [5.4 \pm 0.4 (\text{stat}) \pm 0.4 (\text{syst}) \pm 0.9 (\text{ext})]\%$, where the first two uncertainties are statistical and systematic and the last is due to external parameters. The measurement also provides an estimate of the $B_s^{(*)}\bar{B}_s^{(*)}$ production cross-section, $\sigma(e^+e^- \to B_s^{(*)}\bar{B}_s^{(*)}) = (53.8 \pm 1.4 (\text{stat}) \pm 4.0 (\text{syst}) \pm 3.4 (\text{ext}))\,{\rm pb}$, at the center-of-mass energy $\sqrt{s} = 10.86\,{\rm GeV}$. Comment: 13 pages, 2 figures, submitted to Phys. Rev. D |
| Databáze: | OpenAIRE |
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