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| 題名: | Search for a new bottomonium state decaying to Υ(1S)π+π- in pp collisions at s=8 TeV |
| 作者: | 余欣珊;Chatrchyan, S.;Waltenberger, W.;Mccartin, J.;Yazgan, E.;Da Costa, E.M.;Vilela Pereira, A.;Tao, J.;Sanabria, J.C.;Lelas, D.;Kuotb Awad, A.M.;Nayak, A.;Charlot, C.;Dahms, T.;Agram, J.-L.;Lethuillier, M.;Sordini, V.;Papacz, P.;Reithler, H.;Burgmeier, A.;Costanza, F.;Walsh, R.;Höing, R.S.;Descroix, A.;Szillasi, Z.;Raics, P.;Bhatnagar, V.;Chatterjee, K.;De Palma, M.;Albergo, S.;Potenza, R.;Paoletti, S.;De Cosa, A.;Ronchese, P.;Tosi, M.;Degano, A.;Kong, D.J.;Choi, S.;Reyes-Santos, M.A.;Ahmad, M.;Khan, W.A.;Górski, M.;Afanasiev, S.;Gavrilenko, M.;Matveev, V.;Moisenz, P.;Sulimov, V.;Vorobyev, A.;Semenov, S.;Stolin, V.;Boos, E.;Lokhtin, I.;Konstantinov, D.;Djordjevic, M.;Krpic, D.;Milosevic, J.;Fernandez Bedoya, C.;Flix, J.;Fernandez, M.;DʼAlfonso, M.;Georgiou, G.;Stieger, B.;Veres, G.I.;Dissertori, G.;Grab, C.;Weber, H.A.;Kuo, C.M.;Girgis, S.;Bilin, B.;Frazier, R.;Metson, S.;Pioppi, M.;Apresyan, A.;Calamba, A.;Kwan, S.;Haas, J.;Yumiceva, F.;Gerber, C.E.;Merlo, J.-P.;Bauer, G.;Meier, F.;Godshalk, A.;Jain, S.;Alverson, G.;Baumgartel, D.;Lannon, K.;Lynch, S.;Antonelli, L.;Vuosalo, C.;Zuranski, A.;De Mattia, M.;Jones, M.;Svyatkovskiy, A.;Geurts, F.J.M.;Goldenzweig, P.;Hidas, D.;Robles, J.;Salur, S.;Spanier, S.;Dragoiu, C.;Savin, A. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Exotic quarkonia;Physics |
| 日期: | 2013-11-25 |
| 上傳時間: | 2026-04-23 12:48:40 (UTC+8) |
| 出版者: | United States: Elsevier B.V |
| 摘要: | 摘要： The results of a search for the bottomonium counterpart, denoted as Xb, of the exotic charmonium state X(3872) is presented. The analysis is based on a sample of pp collisions at s=8 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 20.7 fb−1. The search looks for the exclusive decay channel Xb→ϒ(1S)π+π− followed by ϒ(1S)→μ+μ−. No evidence for an Xb signal is observed. Upper limits are set at the 95% confidence level on the ratio of the inclusive production cross sections times the branching fractions to ϒ(1S)π+π− of the Xb and the ϒ(2S). The upper limits on the ratio are in the range 0.9–5.4% for Xb masses between 10 and 11 GeV. These are the first upper limits on the production of a possible Xb at a hadron collider.
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.57-76
資源來源： Elsevier ScienceDirect
版權： 2013 CERN
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2013.10.016 |
| 顯示於類別: | [物理學系] 期刊論文
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