Search for long-lived particles in events with photons and missing energy in proton–proton collisions at [Formula presented] TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/106414

Title:	Search for long-lived particles in events with photons and missing energy in proton–proton collisions at [Formula presented] TeV
Authors:	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.
Contributors:	理學院物理學系
Keywords:	CMS;Displaced;Exotica;GMSB;LHC;Long-lived;Photons;SUSY
Date:	2013-05-24
Issue Date:	2026-04-23 13:21:57 (UTC+8)
Publisher:	Netherlands: Elsevier B.V
Abstract:	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
Appears in Collections:	[Department of Physics] journal & Dissertation

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