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| 題名: | Measurement of the Bs0→μ+μ- branching fraction and search for B0→μ+μ- with the CMS experiment |
| 作者: | 余欣珊;Chatrchyan, S;Khachatryan, V;Sirunyan, A M;Tumasyan, A;Adam, W;Bergauer, T;Dragicevic, M;Erö, J;Fabjan, C;Friedl, M;Frühwirth, R;Ghete, V M;Hörmann, N;Hrubec, J;Jeitler, M;Kiesenhofer, W;Knünz, V;Krammer, M;Krätschmer, I;Liko, D;Mikulec, I;Rabady, D;Rahbaran, B;Rohringer, C;Rohringer, H;Schöfbeck, R;Strauss, J;Taurok, A;Treberer-Treberspurg, W;Waltenberger, W;Wulz, C-E;Mossolov, V;Shumeiko, N;Suarez Gonzalez, J;Alderweireldt, S;Bansal, M;Bansal, S;Cornelis, T;De Wolf, E A;Janssen, X;Knutsson, A;Luyckx, S;Mucibello, L;Ochesanu, S;Roland, B;Rougny, R;Staykova, Z;Van Haevermaet, H;Van Mechelen, P;Van Remortel, N;Van Spilbeeck, A;Blekman, F;Blyweert, S;D'Hondt, J;Kalogeropoulos, A;Keaveney, J;Lowette, S;Maes, M;Olbrechts, A;Tavernier, S;Van Doninck, W;Van Mulders, P;Van Onsem, G P;Villella, I;Caillol, C;Clerbaux, B;De Lentdecker, G;Favart, L;Gay, A P R;Hreus, T;Léonard, A;Marage, P E;Mohammadi, A;Perniè, L;Reis, T;Seva, T;Thomas, L;Vander Velde, C;Vanlaer, P;Wang, J;Adler, V;Beernaert, K;Benucci, L;Cimmino, A;Costantini, S;Dildick, S;Garcia, G;Klein, B;Lellouch, J;Marinov, A;Mccartin, J;Ocampo Rios, A A;Ryckbosch, D;Sigamani, M;Strobbe, N;Thyssen, F;Tytgat, M;Walsh, S;Yazgan, E;Zaganidis, N |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2013-09-05 |
| 上傳時間: | 2026-04-23 12:12:32 (UTC+8) |
| 出版者: | American Physical Society;United States |
| 摘要: | 摘要： Results are presented from a search for the rare decays Bs(0)→μ+ μ- and B(0)→μ+ μ- in pp collisions at sqrt[s]=7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 fb(-1), respectively, collected by the CMS experiment at the LHC. An unbinned maximum-likelihood fit to the dimuon invariant mass distribution gives a branching fraction B(Bs(0)→μ+ μ-)=(3.0(-0.9)(+1.0))×10(-9), where the uncertainty includes both statistical and systematic contributions. An excess of Bs(0)→μ+ μ- events with respect to background is observed with a significance of 4.3 standard deviations. For the decay B(0)→μ+ μ- an upper limit of B(B(0)→μ+ μ-)<1.1×10(-9) at the 95% confidence level is determined. Both results are in agreement with the expectations from the standard model.
其他題名： Phys Rev Lett
出版者： United States
出版日期： 2013-09-06
出處： Physical review letters, 2013-09, Vol.111 (10), p.101804
資源來源： American Physical Society Journals
識別號： ISSN: 1079-7114
識別號： EISSN: 1079-7114
識別號： DOI: 10.1103/PhysRevLett.111.101804
識別號： PMID: 25166654 |
| 顯示於類別: | [物理學系] 期刊論文
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