Search for a standard model-like Higgs boson in the μ+μ− and e+e− decay channels at the LHC

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105755

Title:	Search for a standard model-like Higgs boson in the μ+μ− and e+e− decay channels at the LHC
Authors:	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.
Contributors:	理學院物理學系
Keywords:	CMS;Dielectron;Dilepton;Dimuon;Electron;Higgs;Higgs boson;High Energy Physics - Experiment;Lepton;Muon;Physics
Date:	2015-05-11
Issue Date:	2026-04-23 12:52:22 (UTC+8)
Publisher:	Netherlands: Elsevier B.V
Abstract:	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
Appears in Collections:	[Department of Physics] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	17	View/Open

社群 sharing

Loading...