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| 題名: | Measurement of the prompt J/ψ and ψ(2S) polarizations in pp collisions at s=7 TeV |
| 作者: | 林宗泰;Chatrchyan, S.;Waltenberger, W.;Roland, B.;Van Onsem, G.P.;Vander Velde, C.;Sigamani, M.;Pagano, D.;Martins, T.;Souza, M.H.G.;Pavlov, B.;Luetic, J.;Assran, Y.;Voutilainen, M.;Karimäki, V.;Kinnunen, R.;Beaudette, F.;Fontaine, J.-C.;Brochet, S.;Cherepanov, V.;Bethani, A.;Hauk, J.;Schmidt, A.;Nürnberg, A.;Ott, J.;Ulrich, R.;Markou, A.;Gupta, R.;Maity, M.;Silvestris, L.;Benussi, L.;Benaglia, A.;Lucchini, M.T.;Lacaprara, S.;Ronchese, P.;Fiori, F.;Longo, E.;Mariotti, C.;Goh, J.;Lee, J.;Kazana, M.;Wrochna, G.;Bunkowski, K.;Gallinaro, M.;Rodrigues Antunes, J.;Varela, J.;Lanev, A.;Matveev, V.;Dermenev, A.;Kirsanov, M.;Snigirev, A.;Soares, M.S.;Fernandez Menendez, J.;Folgueras, S.;Graziano, A.;Vila, I.;De Guio, F.;Guida, R.;Meschi, E.;Reece, W.;Zeuner, W.D.;Kotlinski, D.;Hits, D.;Meister, D.;Tauscher, L.;Cardaci, M.;Grundler, U.;Tzeng, Y.M.;Dozen, C.;Bilin, B.;Barlas, E.;Grimes, M.;Marrouche, J.;Seez, C.;Symonds, P.;Cutts, D.;Kukartsev, G.;Rakness, G.;Macneill, I.;Tu, Y.;Cihangir, S.;Joshi, U.;Lincoln, D.;Mrenna, S.;Vidal, R.;De Gruttola, M.;Betts, R.R.;Tonjes, M.B.;Di Matteo, L.;Zhang, J.;Odell, N.;Schmitt, M.;Velasco, M.;Ramirez Vargas, J.E.;Zabel, J.;Goldenzweig, P.;Khotilovich, V.;Hirosky, R.;Mozer, M.U.;Perry, T.;Polese, G. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Physics;Quarkonium polarization;Quarkonium production |
| 日期: | 2013-12-18 |
| 上傳時間: | 2026-04-23 12:15:44 (UTC+8) |
| 出版者: | Elsevier B.V |
| 摘要: | 摘要： The polarizations of prompt J/ψ and ψ(2S) mesons are measured in proton–proton collisions at s=7 TeV, using a dimuon data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.9 fb−1. The prompt J/ψ and ψ(2S) polarization parameters λϑ, λφ, and λϑφ, as well as the frame-invariant quantity λ˜, are measured from the dimuon decay angular distributions in three different polarization frames. The J/ψ results are obtained in the transverse momentum range 14<pT<70 GeV, in the rapidity intervals |y|<0.6 and 0.6<|y|<1.2. The corresponding ψ(2S) results cover 14<pT<50 GeV and include a third rapidity bin, 1.2<|y|<1.5. No evidence of large polarizations is seen in these kinematic regions, which extend much beyond those previously explored.
出版者： Elsevier B.V
出版日期： 2013-12-18
出處： Physics letters. B, 2013-12, Vol.727 (4-5), p.381-402
資源來源： Elsevier ScienceDirect Journals Complete
版權： 2013 CERN
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2013.10.055 |
| 顯示於類別: | [物理學系] 期刊論文
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