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| 題名: | Measurements of branching fractions of leptonic and hadronic D s+ meson decays and extraction of the Ds + meson decay constant |
| 作者: | 陳鎰鋒;Zupanc, A.;Arinstein, K.;Aushev, T.;Bala, A.;Bozek, A.;Brodzicka, J.;Browder, T. E.;Chang, M.-C.;Chekelian, V.;Chen, P.;Cheon, B. G.;Chilikin, K.;Chistov, R.;Cho, K.;Chobanova, V.;Dalseno, J.;Drásal, Z.;Eidelman, S.;Ferber, T.;Gaur, V.;Gabyshev, N.;Gillard, R.;Goh, Y. M.;Golob, B.;Hayasaka, K.;Hayashii, H.;Hoshi, Y.;Hyun, H. J.;Inami, K.;Itoh, R.;Julius, T.;Kato, E.;Kawai, H.;Kawasaki, T.;Kim, D. Y.;Kim, J. B.;Kim, J. H.;Kim, M. J.;Klucar, J.;Ko, B. R.;Korpar, S.;Krokovny, P.;Kronenbitter, B.;Kumita, T.;Kwon, Y.-J.;Libby, J.;Liu, Z. Q.;Mohanty, G. B.;Moll, A.;Nedelkovska, E.;Nisar, N. K.;Nitoh, O.;Ogawa, S.;Okuno, S.;Park, H.;Park, H. K.;Pedlar, T. K.;Petrič, M.;Piilonen, L. E.;Ritter, M.;Röhrken, M.;Rostomyan, A.;Ryu, S.;Sahoo, H.;Saito, T.;Sakai, Y.;Santelj, L.;Savinov, V.;Schneider, O.;Schwanda, C.;Semmler, D.;Senyo, K.;Shapkin, M.;Shen, C. P.;Shiu, J.-G.;Sibidanov, A.;Simon, F.;Sohn, Y.-S.;Sokolov, A.;Solovieva, E.;Starič, M.;Sumiyoshi, T.;Tamponi, U.;Tsuboyama, T.;Uchida, M.;Usov, Y.;Vahsen, S. E.;Van Hulse, C.;Wagner, M. N.;Wang, C. H.;Wang, M.-Z.;Wang, P.;Wang, X. L.;Watanabe, M.;Watanabe, Y.;Won, E.;Yashchenko, S.;Zhang, Z. P.;Zhilich, V.;Zhulanov, V. |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2013-01-01 |
| 上傳時間: | 2026-04-23 12:26:42 (UTC+8) |
| 出版者: | Springer Verlag;United States: Springer Berlin |
| 摘要: | 摘要： We present measurements of absolute branching fractions of hadronic and lep-tonic$ D_s^{+} $decays to K − K + π + ,$ {{\overline{K}}^0} $K + , ηπ + , μ + ν μ and τ + ν τ and report a search for the leptonic$ D_s^{+} $→ e + ν e decays. The results are obtained from a data sample of 913 fb −1 collected at or near the$ \varUpsilon $(4 S ) and$ \varUpsilon $(5 S ) resonances with the Belle detector at the KEKB asymmetric-energy e + e − collider. The branching fractions of hadronic decays are measured to be$ \begin{array}{*{20}{c}} {\mathcal{B}\left( {D_s^{+}\ \to\ {K^{-}}{K^{+}}{\pi^{+}}} \right) = \left( {5.06\pm 0.15\pm 0.21} \right)\%,} \\ {\mathcal{B}\left( {D_s^{+}\ \to\ {{\overline{K}}^0}{K^{+}}} \right) = \left( {2.95\pm 0.11\pm 0.09} \right)\%,} \\ {\mathcal{B}\left( {D_s^{+}\ \to\ \eta {\pi^{+}}} \right) = \left( {1.82\pm 0.14\pm 0.07} \right)\%,} \\ \end{array} $where the first and second uncertainties are statistical and systematic, respectively. The branching fractions of leptonic decays are measured to be$ \begin{array}{*{20}{c}} {\mathcal{B}\left( {D_s^{+}\ \to\ {\mu^{+}}{\nu_{\mu }}} \right)=\left( {0.531\pm 0.028\pm 0.020} \right)\%,} \\ {\mathcal{B}\left( {D_s^{+}\to {\tau^{+}}{\nu_{\tau }}} \right)=\left( {5.70\pm 0.21_{-0.30}^{-0.31 }} \right)\%,} \\ \end{array} $which are combined to determine the$ D_s^{+} $meson decay constant$ {f_{{{D_s}}}=\left( {255.5\pm 4.2\pm 5.1} \right)\ \mathrm{MeV}. $We find no significant signal for$ D_s^{+} $→ e + ν e decays and set an upper limit of$ \mathcal{B}\left( {D_s^{+}\ \to\ {e^{+}}{\nu_e}} \right) $< 1 . 0(0 . 83) × 10 −4 at 95% (90%) confidence level.
出版者： United States: Springer Berlin
出版日期： 2013-09-25
出處： The journal of high energy physics, 2013-09, Vol.2013 (9), Article 139
資源來源： Publicly Available Content Database
識別號： ISSN: 1029-8479
識別號： ISSN: 1126-6708
識別號： ISSN: 1127-2236
識別號： EISSN: 1029-8479
識別號： DOI: 10.1007/JHEP09(2013)139 |
| 顯示於類別: | [物理學系] 期刊論文
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