Measurement of the CP-violating weak phase φs and the decay width difference δΓc using the Bs0→J/ψφ(1020) decay channel in pp collisions at √ s=8 TeV

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题名:	Measurement of the CP-violating weak phase φs and the decay width difference δΓc using the Bs0→J/ψφ(1020) decay channel in pp collisions at √ s=8 TeV
作者:	余欣珊;Sirunyan, A.M.;Hartl, C.;Jeitler, M.;Knutsson, A.;Randle-conde, A.;Vander Velde, C.;Zenoni, F.;Garcia, G.;Favart, D.;Hamer, M.;Puljak, I.;Luetic, J.;Ptochos, F.;Razis, P.A.;Lindén, T.;Dejardin, M.;Denegri, D.;Filipovic, N.;Skovpen, K.;Laktineh, I.B.;Pequegnot, A.L.;Reithler, H.;Hoehle, F.;Pistone, C.;Dolinska, G.;Steinbrück, G.;Troendle, D.;Frensch, F.;Giffels, M.;Daskalakis, G.;Tziaferi, E.;Beri, S.B.;Banerjee, S.;Behnamian, H.;De Palma, M.;Masetti, G.;Travaglini, R.;Tosi, S.;Bisello, D.;Lacaprara, S.;Maron, G.;Ratti, S.P.;Vitulo, P.;Spagnolo, P.;Del Re, D.;Diemoz, M.;Rahatlou, S.;Rovelli, C.;Monaco, V.;Tamponi, U.;Vaitkus, J.;Butler, P.H.;Ahmad, A.;Shoaib, M.;Konoplyanikov, V.;Epshteyn, V.;Vlasov, E.;Dremin, I.;Volkov, A.;De Guio, F.;Dupont, N.;Gigi, D.;Lourenço, C.;Nemallapudi, M.V.;Dittmar, M.;Quittnat, M.;Wallny, R.;Robmann, P.;Bartek, R.;Meng, Z.;Baber, M.;Corpe, L.;Hall, G.;Nikitenko, A.;Pela, J.;Wilbur, S.;Yohay, R.;Long, O.R.;Bradmiller-Feld, J.;Golf, F.;Bunn, J.;Russ, J.;Konigsberg, J.;Veeraraghavan, V.;Kalakhety, H.;Ozok, F.;Belloni, A.;Innocenti, G.M.;Sumorok, K.;Bose, S.;Dolen, J.;Pozdnyakov, A.;Marinelli, N.;Svyatkovskiy, A.;Demina, R.;Hughes, E.;Pakhotin, Y.;Xia, F.;Karchin, P.E.;Christian, A.
贡献者:	理學院物理學系
关键词:	B-physics;CMS;CP violation;Physics
日期:	2016-06-10
上传时间:	2026-04-23 12:12:58 (UTC+8)
出版者:	Elsevier B.V
摘要:	摘要： The CP-violating weak phase ϕs of the Bs0 meson and the decay width difference ΔΓs of the Bs0 light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of Bs0→J/ψϕ(1020)→μ+μ−K+K− decays. The analysed data set corresponds to an integrated luminosity of 19.7fb−1 collected in pp collisions at a centre-of-mass energy of 8TeV. A total of 49 200 reconstructed Bs0 decays are used to extract the values of ϕs and ΔΓs by performing a time-dependent and flavour-tagged angular analysis of the μ+μ−K+K− final state. The weak phase is measured to be ϕs=−0.075±0.097(stat)±0.031(syst) rad, and the decay width difference is ΔΓs=0.095±0.013(stat)±0.007(syst) ps−1. 出版者： Elsevier B.V 出版日期： 2016-06-10 出處： Physics letters. B, 2016-06, Vol.757, p.97-120 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2016 CERN for the benefit of the CMS Collaboration 識別號： ISSN: 0370-2693 識別號： EISSN: 1873-2445 識別號： DOI: 10.1016/j.physletb.2016.03.046
显示于类别:	[物理學系] 期刊論文

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