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| 題名: | Measurement of prompt J/ψ pair production in pp collisions at s = 7 Tev |
| 作者: | 余欣珊;Gonzalez, J. Suarez;Bansal, S.;Cornelis, T.;De Wolf, E. A.;Keaveney, J.;Van Onsem, G. P.;Gay, A. P. R.;Popov, A.;Santaolalla, J.;Peltola, T.;Bloch, D.;Chierici, R.;Fan, J.;Ille, B.;Perieanu, A.;Olschewski, M.;Choudhury, S.;Pardos, C. Diez;Hempel, M.;Kieseler, J.;Cipriano, P. M. Ribeiro;Steinbrück, G.;Husemann, U.;Ujvari, B.;Sharan, M.;Gurtu, A.;Mohanty, G. B.;Felcini, M.;Iaselli, G.;Brigliadori, L.;Guiducci, L.;Marcellini, S.;Gerosa, R.;Dall’Osso, M.;Margoni, M.;Verdini, P. G.;Vernieri, C.;Maselli, S.;Solano, A.;Park, I. C.;Choi, Y.;Ahmad, A.;Khan, W. A.;Misiura, M.;Gallinaro, M.;Belyaev, A.;Hansen, M.;Schäfer, C.;Donegà, M.;Pauss, F.;Theofilatos, K.;Hinzmann, A.;Lu, Y. J.;Yu, S. S.;Dozen, C.;Hos, I.;Yücel, M.;Petyt, D.;Acosta, M. Vazquez;Khan, A.;Turner, M.;Heister, A.;Ferapontov, A.;Conway, J.;Everaerts, P.;Farrell, C.;Weber, M.;Palmer, C.;Pieri, M.;Welke, C.;Duarte, J.;Wilkinson, R.;Chu, J.;Salvati, E.;Whitmore, J.;Hewamanage, S.;Varelas, N.;Tan, P.;Gritsan, A. V.;Gray, J.;Noonan, D.;Cali, I. A.;Chan, M.;Lee, Y.-J.;Luckey, P. D.;Rusack, R.;Bose, S.;Baumgartel, D.;Mucia, N.;Lynch, S.;Pearson, T.;Winer, B. L.;Radburn-Smith, B. C.;Wang, F.;Garcia-Bellido, A.;Hidas, D.;Schnetzer, S.;Cox, B.;Karchin, P. E.;Dasu, S. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | B-physics;Classical and Quantum Gravitation;Elementary Particles;hadron-hadron scattering;Physics;Physics and Astronomy;Quantum Field Theories;Quantum Field Theory;Quantum Physics;Relativity Theory;String Theory |
| 日期: | 2014-01-01 |
| 上傳時間: | 2026-04-23 12:11:37 (UTC+8) |
| 出版者: | Berlin/Heidelberg: Springer Berlin Heidelberg |
| 摘要: | 摘要： A bstract Production of prompt J/ ψ meson pairs in proton-proton collisions at s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb −1 . The two J/ ψ mesons are fully reconstructed via their decays into μ + μ − pairs. This observation provides for the first time access to the high-transverse-momentum region of J/ ψ pair production where model predictions are not yet established. The total and differential cross sections are measured in a phase space defined by the individual J/ ψ transverse momentum ( p T J/ ψ ) and rapidity (| y J/ ψ |): | y J/ ψ | < 1.2 for p T J/ ψ > 6.5 GeV/ c ; 1.2 < | y J/ ψ | < 1.43 for a p T threshold that scales linearly with | y J/ ψ | from 6.5 to 4.5 GeV/ c ; and 1.43 < | y J/ ψ | < 2.2 for p T J/ ψ > 4.5 GeV/ c . The total cross section, assuming unpolarized prompt J/ ψ pair production is 1.49 ± 0.07 (stat) ±0.13 (syst) nb. Different assumptions about the J/ ψ polarization imply modifications to the cross section ranging from −31% to +27%.
其他題名： J. High Energ. Phys
出版者： Berlin/Heidelberg: Springer Berlin Heidelberg
出版日期： 2014-09-17
出處： The journal of high energy physics, 2014-09, Vol.2014 (9)
資源來源： Publicly Available Content Database (Proquest)
版權： The Author(s) 2014
識別號： ISSN: 1029-8479
識別號： EISSN: 1029-8479
識別號： DOI: 10.1007/JHEP09(2014)094 |
| 顯示於類別: | [物理學系] 期刊論文
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