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| 題名: | Search for narrow resonances in dilepton mass spectra in pp collisions at s=7TeV |
| 作者: | 林宗泰;Chatrchyan, S.;Wagner, P.;Waltenberger, W.;Roland, B.;Blyweert, S.;Van Onsem, G.P.;Vanelderen, L.;Giammanco, A.;Hammad, G.H.;Lagana, C.;Iaydjiev, P.;Litov, L.;Xiao, H.;Fedi, G.;Broutin, C.;Zabi, A.;Agram, J.-L.;Chierici, R.;Bontenackels, M.;Lange, W.;Marfin, I.;Melzer-Pellmann, I.-A.;Kirschenmann, H.;Oehler, A.;Hidas, P.;Horvath, D.;Kaur, M.;Mohanty, A.K.;Abbrescia, M.;Marangelli, B.;Paoletti, S.;Bianco, S.;Di Matteo, L.;Lacaprara, S.;Ronchese, P.;Azzurri, P.;Verdini, P.G.;Organtini, G.;Choi, Y.K.;Asghar, M.I.;Szleper, M.;Ferreira Parracho, P.G.;Shmatov, S.;Uvarov, L.;Obraztsov, S.;Dremin, I.;Dupont-Sagorin, N.;Mozer, M.U.;Sekmen, S.;Freudenreich, K.;Pauss, F.;Kao, K.Y.;Senkin, S.;Dauncey, P.;Marrouche, J.;Pesaresi, M.;Sharp, P.;Cole, J.E.;Khan, A.;Ferapontov, A.;Speer, T.;Ignatenko, M.;Long, O.R.;Yagil, A.;Geffert, P.;Incandela, J.;Ribnik, J.;Gataullin, M.;Traczyk, P.;Paulini, M.;Vorobiev, I.;Luiggi Lopez, E.;Chetluru, V.;Musienko, Y.;Spiegel, L.;Yun, J.C.;Acosta, D.;Matchev, K.;Gerber, C.E.;Silkworth, C.;Clarida, W.;Noonan, D.;Bolton, T.;Wright, D.;Gomez, J.A.;Hadley, N.J.;Kirn, M.;Rossato, K.;Ralph, D.;Stephans, G.S.F.;Chasco, M.;Marinelli, N.;Tully, C.;Gotra, Y.;Demortier, L.;Lungu, G.;Thomas, S.;Yang, Z.C.;Appelt, E.;Lanaro, A. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Dileptons;Resonances |
| 日期: | 2012-08-14 |
| 上傳時間: | 2026-04-23 13:26:49 (UTC+8) |
| 出版者: | Netherlands: Elsevier B.V |
| 摘要: | 摘要： A search for narrow, high-mass resonances decaying to electron or muon pairs has been performed using pp collision data collected at s=7TeV by the CMS experiment in 2011. The data sample corresponds to an integrated luminosity of approximately 5 fb−1. The event yields observed in the signal regions are consistent with predictions of the standard model backgrounds, and upper limits on the cross section times branching fraction for a resonance decaying to dileptons are extracted from a shape analysis of the dilepton invariant mass distribution. The resulting mass limits at 95% confidence level are 2330 GeV for the Z′ in the Sequential Standard Model, 2000 GeV for the superstring-inspired Zψ′ resonance, 890 (540) GeV for the Stueckelberg extension ZSt′ with the mass parameter ϵ=0.06 (0.04), and 2140 (1810) GeV for Kaluza–Klein gravitons with the coupling parameter k/M¯Pl of 0.10 (0.05). These limits are the most stringent to date.
出版者： Netherlands: Elsevier B.V
出版日期： 2012-08-14
出處： Physics letters. B, 2012-08, Vol.714 (2-5), p.158-179
資源來源： Elsevier ScienceDirect Journals
版權： 2012 Elsevier B.V.
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2012.06.051 |
| 顯示於類別: | [物理學系] 期刊論文
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