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| 題名: | Measurement of the Υ(1S), Υ(2S), and Υ(3S) cross sections in pp collisions at s=7TeV |
| 作者: | 余欣珊;Chatrchyan, S.;Mossolov, V.;Souza, M.H.G.;Malek, M.;Teng, H.;Morovic, S.;Mousa, J.;Mahmoud, M.A.;Lassila-Perini, K.;Chierici, R.;Schael, S.;Heidemann, C.;Bontenackels, M.;Erdogan, Y.;Lange, W.;Schmidt, A.;Loukas, D.;Nishu, N.;Kumar, V.;Aziz, T.;Pacifico, N.;Fasanella, D.;Chiorboli, M.;DʼAlessandro, R.;Focardi, E.;Gonzi, S.;Tosi, S.;Lista, L.;Bisello, D.;Dosselli, U.;Zumerle, G.;Saha, A.;Cavallari, F.;Casasso, S.;Chang, S.;Kim, J.Y.;Goh, J.;Lee, J.;Lee, S.;Lopez-Fernandez, R.;Carrillo Moreno, S.;Morelos Pineda, A.;Popov, V.;Popov, A.;Azhgirey, I.;Grishin, V.;Krpic, D.;Milosevic, J.;Aguilar-Benitez, M.;Fernandez, M.;Vilar Cortabitarte, R.;Bernet, C.;Giordano, D.;Guida, R.;Kaadze, K.;Santanastasio, F.;Eugster, J.;Theofilatos, K.;Vergili, L.N.;Surat, U.E.;Heath, G.P.;Lyons, L.;Vazquez Acosta, M.;Demiragli, Z.;Garabedian, A.;Chertok, M.;Conway, J.;Rakness, G.;Wasserbaech, S.;Krutelyov, V.;Bunn, J.;Chen, Y.;Rogan, C.;Veverka, J.;Ulmer, K.A.;Bhat, P.C.;Mason, D.;Yang, F.;Das, S.;Prosper, H.;Lacroix, F.;Giurgiu, G.;Bendavid, J.;Goncharov, M.;Dahmes, B.;Kubik, A.;Karmgard, D.J.;Planer, M.;Wayne, M.;Marlow, D.;Everett, A.;Vidal Marono, M.;Eshaq, Y.;Goldenzweig, P.;Dragoiu, C.;Volobouev, I.;Greene, S.;Gurrola, A.;Anderson, M.;Lazaridis, C. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Dimuons;Physics;Quarkonia;Upsilon |
| 日期: | 2013-11-25 |
| 上傳時間: | 2026-04-23 12:24:38 (UTC+8) |
| 出版者: | United States: Elsevier B.V |
| 摘要: | 摘要： The ϒ(1S), ϒ(2S), and ϒ(3S) production cross sections are measured using a data sample corresponding to an integrated luminosity of 35.8±1.4 pb−1 of proton–proton collisions at s=7 TeV, collected with the CMS detector at the LHC. The ϒ resonances are identified through their decays to dimuons. Integrated over the ϒ transverse momentum range pTϒ<50 GeV/c and rapidity range |yϒ|<2.4, and assuming unpolarized ϒ production, the products of the ϒ production cross sections and dimuon branching fractions areσ(pp→ϒ(1S)X)⋅B(ϒ(1S)→μ+μ−)=(8.55±0.05−0.50+0.56±0.34)nb,σ(pp→ϒ(2S)X)⋅B(ϒ(2S)→μ+μ−)=(2.21±0.03−0.14+0.16±0.09)nb,σ(pp→ϒ(3S)X)⋅B(ϒ(3S)→μ+μ−)=(1.11±0.02−0.08+0.10±0.04)nb, where the first uncertainty is statistical, the second is systematic, and the third is from the uncertainty in the integrated luminosity. The differential cross sections in bins of transverse momentum and rapidity, and the cross section ratios are presented. Cross section measurements performed within a restricted muon kinematic range and not corrected for acceptance are also provided. These latter measurements are independent of ϒ polarization assumptions. The results are compared to theoretical predictions and previous measurements.
出版者： United States: Elsevier B.V
出版日期： 2013-11-01
出處： Physics Letters. Section B, 2013-11, Vol.727 (1-3), p.101-125
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.2013.10.033 |
| 顯示於類別: | [物理學系] 期刊論文
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