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| 題名: | Search for a standard model-like Higgs boson in the μ+μ− and e+e− decay channels at the LHC |
| 作者: | 林宗泰;Sirunyan, A.M.;Waltenberger, W.;Wulz, C.-E.;De Wolf, E.A.;Van De Klundert, M.;Blekman, F.;Heracleous, N.;Mccartin, J.;Salva Diblen, S.;Strobbe, N.;Tytgat, M.;Yazgan, E.;Beliy, N.;Brito, L.;Sznajder, A.;Marinov, A.;Finger, M.;Voutilainen, M.;Karimäki, V.;Kinnunen, R.;Beaudette, F.;Mironov, C.;Paganini, P.;Sauvan, J.B.;Fontaine, J.-C.;Le Bihan, A.-C.;Beaupere, N.;Brochet, S.;Lethuillier, M.;Erdmann, M.;Papacz, P.;Burgmeier, A.;Costanza, F.;Saxena, P.;Erfle, J.;Lange, J.;Loukas, D.;Bencze, G.;Hajdu, C.;Naimuddin, M.;Ranjan, K.;Parida, B.;Wickramage, N.;Giacomelli, P.;Lacaprara, S.;Margoni, M.;Salvini, P.;Boccali, T.;Giassi, A.;Umer, T.;Kazana, M.;Gallinaro, M.;Smirnov, V.;Dermenev, A.;Kirsanov, M.;Bitioukov, S.;Pérez-Calero Yzquierdo, A.;Gomez, G.;Scodellaro, L.;Quittnat, M.;Akin, I.V.;Poll, A.;Womersley, W.J.;Pesaresi, M.;Teodorescu, L.;Dittmann, J.;Liu, H.;Berry, E.;Swanson, J.;Ko, W.;Smith, J.;Andrews, W.;Holzner, A.;Campagnari, C.;Apresyan, A.;Wagner, S.R.;Thompson, J.;Soha, A.;Furic, I.K.;Cavanaugh, R.;Onel, Y.;Penzo, A.;Wang, Q.;Barfuss, A.F.;Tonjes, M.B.;Goncharov, M.;Sumorok, K.;Kao, S.C.;Elmer, P.;Lujan, P.;Mooney, M.;Barnes, V.E.;Hu, Z.;Barker, A.;Gray, R.;York, A.;Kovitanggoon, K.;Ledovskoy, A.;Dasu, S.;Lazaridis, C. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Dielectron;Dilepton;Dimuon;Electron;Higgs;Higgs boson;High Energy Physics - Experiment;Lepton;Muon;Physics |
| 日期: | 2015-05-11 |
| 上傳時間: | 2026-04-23 12:52:22 (UTC+8) |
| 出版者: | Netherlands: Elsevier B.V |
| 摘要: | 摘要： A search is presented for a standard model-like Higgs boson decaying to the μ+μ− or e+e− final states based on proton–proton collisions recorded by the CMS experiment at the CERN LHC. The data correspond to integrated luminosities of 5.0 fb−1 at a centre-of-mass energy of 7 TeV and 19.7 fb−1 at 8 TeV for the μ+μ− search, and of 19.7 fb−1 at 8 TeV for the e+e− search. Upper limits on the production cross section times branching fraction at the 95% confidence level are reported for Higgs boson masses in the range from 120 to 150 GeV. For a Higgs boson with a mass of 125 GeV decaying to μ+μ−, the observed (expected) upper limit on the production rate is found to be 7.4 (6.5−1.9+2.8) times the standard model value. This corresponds to an upper limit on the branching fraction of 0.0016. Similarly, for e+e−, an upper limit of 0.0019 is placed on the branching fraction, which is ≈3.7×105 times the standard model value. These results, together with recent evidence of the 125 GeV boson coupling to τ-leptons with a larger branching fraction consistent with the standard model, confirm that the leptonic couplings of the new boson are not flavour-universal.
出版者： Netherlands: Elsevier B.V
出版日期： 2015-05-11
出處： Physics letters. B, 2015-05, Vol.744 (C), p.184-207
資源來源： Elsevier ScienceDirect Journals Complete - Autoholdings
版權： 2015 CERN for the benefit of the CMS Collaboration.
版權： CC0 1.0 - Universal
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2015.03.048 |
| 顯示於類別: | [物理學系] 期刊論文
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