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| 題名: | Search for long-lived particles in events with photons and missing energy in proton–proton collisions at [Formula presented] TeV |
| 作者: | 余欣珊;Chatrchyan, S.;Bansal, M.;Cornelis, T.;Walsh, S.;Giammanco, A.;Novaes, S.F.;Xiao, H.;Zou, W.;Tuominiemi, J.;Nayak, A.;Chierici, R.;Schael, S.;Heidemann, C.;Flügge, G.;Kargoll, B.;Burgmeier, A.;Costanza, F.;Böser, C.;Sikler, F.;Ujvari, B.;Ahuja, S.;Banerjee, S.;Mazumdar, K.;Colaleo, A.;De Filippis, N.;Rovelli, T.;Chiorboli, M.;DʼAlessandro, R.;Gonzi, S.;Sguazzoni, G.;Margoni, M.;Tosi, M.;Ratti, S.P.;Martini, L.;Sigamani, M.;Mariotti, C.;Della Ricca, G.;Kim, J.Y.;Goh, J.;Lee, J.;Lee, S.;Khalid, S.;Bargassa, P.;Seixas, J.;Azhgirey, I.;Grishin, V.;Krpic, D.;Milosevic, J.;Aguilar-Benitez, M.;Fernandez, M.;Vilar Cortabitarte, R.;Bernet, C.;Giordano, D.;Guida, R.;Hansen, M.;Moser, R.;Nesvold, E.;Palencia Cortezon, E.;Pimiä, M.;Hits, D.;Nef, P.;Chang, Y.W.;Grundler, U.;Kaya, O.;Heath, G.P.;Lyons, L.;Seez, C.;Demiragli, Z.;Garabedian, A.;Chauhan, S.;Pieri, M.;Tadel, M.;Justus, C.;Paulini, M.;Cumalat, J.P.;Thompson, J.;Lipton, R.;Yumiceva, F.;Remington, R.;Sellers, P.;Linn, S.;Markowitz, P.;Rodriguez, J.L.;Gritsan, A.V.;Kenny, R.P.;Ivanov, A.;Svintradze, I.;Gomez Ceballos, G.;Krajczar, K.;De Benedetti, A.;Jessop, C.;Tully, C.;Benedetti, D.;Bolla, G.;Merkel, P.;Zabel, J.;Dragoiu, C.;Sharma, M.;Tuo, S.;Harr, R. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Displaced;Exotica;GMSB;LHC;Long-lived;Photons;SUSY |
| 日期: | 2013-05-24 |
| 上傳時間: | 2026-04-23 13:21:57 (UTC+8) |
| 出版者: | Netherlands: Elsevier B.V |
| 摘要: | 摘要： Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9fb−1 sample of proton–proton collisions at s=7TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m>220GeV (for cτ<500mm), as well as on the proper decay length of the lightest neutralino, cτ>6000mm (for m<150GeV).
出版者： Netherlands: Elsevier B.V
出版日期： 2013-05-24
出處： Physics letters. B, 2013-05, Vol.722 (4-5), p.273-294
資源來源： Elsevier ScienceDirect Journals Complete
版權： 2013 CERN
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2013.04.027 |
| 顯示於類別: | [物理學系] 期刊論文
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