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| 題名: | Observation of a peaking structure in the J/ψφ mass spectrum from B±→J/ψφK± decays |
| 作者: | 余欣珊;Chatrchyan, S.;Waltenberger, W.;Roland, B.;Van Onsem, G.P.;Clerbaux, B.;Gay, A.P.R.;Castello, R.;Lemaitre, V.;Vutova, M.;Kozhuharov, V.;Chen, G.M.;Sanabria, J.C.;Lelas, D.;Hamel de Monchenault, G.;Brom, J.-M.;Chierici, R.;Calpas, B.;Flügge, G.;Kargoll, B.;Lange, W.;Riedl, C.;Schleper, P.;Seidel, M.;Thomsen, J.;Dierlamm, A.;Hartmann, F.;Gupta, R.;Etesami, S.M.;Maggi, M.;Selvaggi, G.;Cavallo, F.R.;Di Matteo, L.;Margoni, M.;Montecassiano, F.;Pazzini, J.;Gabusi, M.;Ratti, S.P.;Riccardi, C.;Menichelli, M.;Giassi, A.;Kraan, A.;Cossutti, F.;Park, H.;Hong, B.;Kim, J.H.;Choi, Y.;Shah, M.A.;Krychkine, V.;Volkov, A.;Alcaraz Maestre, J.;Gomez, G.;Lopez Virto, A.;Scodellaro, L.;Auffray, E.;Ball, A.H.;Magini, N.;Meschi, E.;Pierini, M.;Piparo, D.;Rovere, M.;Casal, B.;Nessi-Tedaldi, F.;Otiougova, P.;Yu, S.S.;Hou, W.-S.;Serin, M.;Ozkorucuklu, S.;Clement, E.;Poll, A.;Iles, G.;Virdee, T.;Speer, T.;Smith, J.;Hanson, G.;Wilken, R.;Campagnari, C.;Rossin, R.;Gaz, A.;Smith, J.G.;Mirman, N.;Teo, W.D.;Spalding, W.J.;Furic, I.K.;Chen, J.;Newsom, C.R.;Tiras, E.;Blumenfeld, B.;Fehling, D.;Maravin, Y.;Pozdnyakov, A.;Lynch, S.;Berry, E.;Jindal, P.;Lujan, P.;Stickland, D.;Lungu, G.;Yang, Z.C.;Montalvo, R.;Perloff, A.;Kovitanggoon, K. |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2014-06-22 |
| 上傳時間: | 2026-04-23 12:33:39 (UTC+8) |
| 出版者: | Elsevier B.V |
| 摘要: | 摘要： A peaking structure in the J/ψϕ mass spectrum near threshold is observed in B±→J/ψϕK± decays, produced in pp collisions at s=7 TeV collected with the CMS detector at the LHC. The data sample, selected on the basis of the dimuon decay mode of the J/ψ, corresponds to an integrated luminosity of 5.2 fb−1. Fitting the structure to an S-wave relativistic Breit–Wigner lineshape above a three-body phase-space nonresonant component gives a signal statistical significance exceeding five standard deviations. The fitted mass and width values are m=4148.0±2.4(stat.)±6.3(syst.)MeV and Γ=28−11+15(stat.)±19(syst.)MeV, respectively. Evidence for an additional peaking structure at higher J/ψϕ mass is also reported.
出版者： Elsevier B.V
出版日期： 2014-06-27
出處： Physics letters. B, 2014-06, Vol.734, p.261-281
資源來源： Elsevier ScienceDirect Journals Complete
版權： 2014 The Authors
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2014.05.055 |
| 顯示於類別: | [物理學系] 期刊論文
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