Search for new physics in events with opposite-sign leptons, jets, and missing transverse energy in pp collisions at s=7 TeV

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题名:	Search for new physics in events with opposite-sign leptons, jets, and missing transverse energy in pp collisions at s=7 TeV
作者:	余欣珊;Chatrchyan, S.;Waltenberger, W.;Blyweert, S.;Van Onsem, G.P.;Vanelderen, L.;Giammanco, A.;Hammad, G.H.;Sznajder, A.;Mercadante, P.G.;Asawatangtrakuldee, C.;Zou, W.;Fedi, G.;Broutin, C.;Agram, J.-L.;Chierici, R.;Bontenackels, M.;Marfin, I.;Melzer-Pellmann, I.-A.;Kirschenmann, H.;Hidas, P.;Horvath, D.;Kaur, M.;Dutta, S.;Kumar, V.;Aziz, T.;Nuzzo, S.;Fasanella, D.;Frosali, S.;Lariccia, P.;Lucaroni, A.;Soffi, L.;Monaco, V.;Musich, M.;Seo, E.;Kwon, E.;Juodagalvis, A.;Cwiok, M.;Almeida, N.;Faccioli, P.;Tlisov, D.;Toropin, A.;Popov, A.;Andreev, V.;Azarkin, M.;Volkov, A.;Alcaraz Maestre, J.;Puerta Pelayo, J.;Romero, L.;Fernandez, M.;Jorda, C.;Coarasa Perez, J.A.;Giffels, M.;Govoni, P.;Lee, Y.-J.;Rovere, M.;Schäfer, C.;Bäni, L.;Bortignon, P.;Dittmar, M.;Moortgat, F.;Thea, A.;Li, S.W.;Lu, Y.J.;Bakirci, M.N.;Hos, I.;Aliev, T.;Bilmis, S.;Frazier, R.;Harder, K.;Martin, W.;Avetisyan, A.;Cox, P.T.;Gardner, M.;Farrell, C.;Sumowidagdo, S.;Wimpenny, S.;Letts, J.;Newman, H.B.;Hopkins, W.;Kilminster, B.;Klima, B.;McBride, P.;Yelton, J.;Askew, A.;Hohlmann, M.;Hamdan, S.;Clarida, W.;Rappoccio, S.;Wood, J.S.;Bendavid, J.;Goncharov, M.;Dahmes, B.;Dominguez, A.;Jessop, C.;Wayne, M.;Laasanen, A.T.;Redjimi, R.;Han, J.;Toback, D.;Grothe, M.
贡献者:	理學院物理學系
关键词:	CMS;Physics;Supersymmetry
日期:	2013-01-08
上传时间:	2026-04-23 13:31:43 (UTC+8)
出版者:	Netherlands: Elsevier B.V
摘要:	摘要： A search is presented for physics beyond the standard model (BSM) in final states with a pair of opposite-sign isolated leptons accompanied by jets and missing transverse energy. The search uses LHC data recorded at a center-of-mass energy s=7 TeV with the CMS detector, corresponding to an integrated luminosity of approximately 5 fb−1. Two complementary search strategies are employed. The first probes models with a specific dilepton production mechanism that leads to a characteristic kinematic edge in the dilepton mass distribution. The second strategy probes models of dilepton production with heavy, colored objects that decay to final states including invisible particles, leading to very large hadronic activity and missing transverse energy. No evidence for an event yield in excess of the standard model expectations is found. Upper limits on the BSM contributions to the signal regions are deduced from the results, which are used to exclude a region of the parameter space of the constrained minimal supersymmetric extension of the standard model. Additional information related to detector efficiencies and response is provided to allow testing specific models of BSM physics not considered in this Letter. 出版者： Netherlands: Elsevier B.V 出版日期： 2013-01-08 出處： Physics letters. B, 2013-01, Vol.718 (3), p.815-840 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2012 CERN 識別號： ISSN: 0370-2693 識別號： EISSN: 1873-2445 識別號： DOI: 10.1016/j.physletb.2012.11.036
显示于类别:	[物理學系] 期刊論文

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