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| 題名: | Search for a Higgs boson decaying into γ*γ→ℓℓγ with low dilepton mass in pp collisions at √s=8 TeV |
| 作者: | 林宗泰;Sirunyan, A.M.;Hartl, C.;Jeitler, M.;Knutsson, A.;Correa Martins Junior, M.;Huertas Guativa, L.M.;Sznajder, A.;Dogra, S.;Padula, Sandra S.;Luetic, J.;Ptochos, F.;Razis, P.A.;Skovpen, K.;Laktineh, I.B.;Pequegnot, A.L.;Endres, M.;Papacz, P.;Hoehle, F.;Calligaris, L.;Perrey, H.;Hoffmann, M.;Steinbrück, G.;Troendle, D.;Hartmann, F.;Husemann, U.;Simonis, H.J.;Wöhrmann, C.;Wolf, R.;Szillasi, Z.;Bartók, M.;Malhotra, S.;Roy Chowdhury, S.;Dutta, D.;Cristella, L.;Capiluppi, P.;Cappello, G.;Giordano, F.;Robutti, E.;Moroni, L.;Carlin, R.;Checchia, P.;Paramatti, R.;Traczyk, P.;Monaco, V.;Romero, A.;Kim, M.S.;Komaragiri, J.R.;Krofcheck, D.;Belyaev, A.;Colino, N.;Puerta Pelayo, J.;Guida, R.;Lecoq, P.;Eller, P.;Pata, J.;Rossini, M.;Caminada, L.;Taroni, S.;Volpe, R.;Cerci, S.;Albayrak, E.A.;Seif El Nasr-storey, S.;Smith, D.;Petridis, K.;Rohlf, J.;Cousins, R.;Takasugi, E.;Shrinivas, A.;Olivito, D.;Golf, F.;Yoo, J.;Chen, Y.;Russ, J.;Skinnari, L.;Weng, Y.;Joshi, U.;Merkel, P.;Acosta, D.;Korytov, A.;Snowball, M.;Markowitz, P.;Kalakhety, H.;Yi, K.;Ferraioli, C.;Jabeen, S.;Kellogg, R.G.;Kunkle, J.;Barbieri, R.;Goncharov, M.;Acosta, J.G.;Stoynev, S.;Hildreth, M.;Hill, C.;Olsen, J.;Kress, M.;Geurts, F.J.M.;Safonov, A.;Xia, F.;Karchin, P.E.;Christian, A. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Dalitz decay;Higgs boson;Physics;PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
| 日期: | 2016-02-10 |
| 上傳時間: | 2026-04-23 12:46:12 (UTC+8) |
| 出版者: | Netherlands: Elsevier |
| 摘要: | 摘要： Our search is described for a Higgs boson decaying into two photons, one of which has an internal conversion to a muon or an electron pair (ℓℓγ). The analysis is performed using proton–proton collision data recorded with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb-1. The events selected have an opposite-sign muon or electron pair and a high transverse momentum photon. No excess above background has been found in the three-body invariant mass range 120 < mℓℓγ < 150 GeV, and limits have been derived for the Higgs boson production cross section times branching fraction for the decay H → γ*γ → ℓℓγ, where the dilepton invariant mass is less than 20 GeV. A Higgs boson with mH=125 GeV has a 95% confidence level (CL) exclusion observed (expected) limit is 6.7 (5.9+2.8-1.8 ) times the standard model prediction. Additionally, an upper limit at 95% CL on the branching fraction of H → (J/ψ)γ for the 125 GeV Higgs boson is set at 1.5 × 10-3.
出版者： Netherlands: Elsevier
出版日期： 2016-02
出處： Physics letters. B, 2016-02, Vol.753 (C), p.341-362
資源來源： DOAJ: Directory of Open Access Journals
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2015.12.039 |
| 顯示於類別: | [物理學系] 期刊論文
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