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| 題名: | J/ψ and ψ (2S) production in pp collisions at √s = 7 TeV |
| 作者: | 林宗泰;Chatrchyan, S.;Clerbaux, B.;Wickens, J.;Guo, S.;Li, W.;Qian, S. J.;Teng, H.;Azzolini, V.;El Mamouni, H.;Viret, S.;Heidemann, C.;Pieta, H.;Davids, M.;Kuessel, Y.;Nowack, A.;Kasemann, M.;Wissing, C.;Buege, V.;Ratnikova, N.;Troendle, D.;Ziebarth, E. B.;Szillasi, Z.;Dhingra, N.;Banerjee, S.;Etesami, S. M.;Fahim, A.;Braibant-Giacomelli, S.;Masetti, G.;Gallo, E.;Fabbricatore, P.;Di Matteo, L.;Buontempo, S.;Dogangun, O.;Torassa, E.;Nappi, A.;Segneri, G.;Pandolfi, F.;Amapane, N.;Chang, S.;Park, S. K.;Sanchez-Hernandez, A.;Dermenev, A.;Toropin, A.;Popov, V.;Belyaev, A.;Sobol, A.;Delgado Peris, A.;Romero, L.;Fernandez, M.;Jorda, C.;Gomez, J. Piedra;Abbaneo, D.;Baillon, P.;Cerminara, G.;Curé, B.;Hegeman, J.;Schwick, C.;Tsirou, A.;Wöhri, H. K.;Bäni, L.;Bortignon, P.;Casal, B.;Dittmar, M.;Pauss, F.;Robmann, P.;Lei, Y. J.;Hall, G.;Tsang, K. V.;Everaerts, P.;Tucker, J.;Tu, Y.;Koay, S. A.;Mullin, S. D.;Stuart, D.;Bunn, J.;Vorobiev, I.;Edelmaier, C. J.;Chatterjee, A.;Abdullin, S.;Bourilkov, D.;Dobur, D.;Gaultney, V.;Betts, R. R.;Tonjes, M. B.;Alver, B.;Cremaldi, L. M.;Perera, L.;Rahmat, R.;Wood, D.;Stoynev, S.;Luo, W.;Pearson, T.;Eusebi, R.;Flanagan, W.;Montalvo, R.;Perloff, A.;Roh, Y.;Cepeda, M.;Ross, I.;Savin, A. |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2012-03-15 |
| 上傳時間: | 2026-04-23 12:07:36 (UTC+8) |
| 摘要: | 摘要： A measurement of the J/ψ and ψ (2S) production cross sections in pp collisions at$ \sqrt {s} = 7{\text{TeV}} $with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb −1 . Using a fit to the invariant mass and decay length distributions, production cross sections have been measured separately for prompt and non-prompt charmonium states, as a function of the meson transverse momentum in several rapidity ranges and integrated in the kinematical regions considered in this study. In addition, cross sections restricted to the acceptance of the CMS detector are given, which are not affected by the polarization of the charmonium states. The ratio of the differential production cross sections of the two states, where systematic uncertainties largely cancel, is also determined. The branching fraction of the inclusive B → ψ (2S) X decay is extracted from the ratio of the non-prompt cross sections to be:$ \mathcal{B}\left( {{\text{B}} \to \psi \left( {\text{2S}} \right)X} \right) = \left( {{3}.0{8}\pm 0.{12}\left( {{\text{stat}}. + {\text{syst}}.} \right)\pm 0.{13}\left( {{\text{theor}}.} \right)\pm 0.{42}\left( {{\mathcal{B}_{\text{PDG}}} \right)} \right) \times {1}{0^{{ - {3}}}. $
出版日期： 2012-02
出處： The journal of high energy physics, 2012-02, Vol.2012 (2), Article 11
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/JHEP02(2012)011 |
| 顯示於類別: | [物理學系] 期刊論文
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