Search for excited leptons in pp collisions at s=7 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/106086

Title:	Search for excited leptons in pp collisions at s=7 TeV
Authors:	余欣珊;Chatrchyan, S.;Bansal, M.;Cornelis, T.;Walsh, S.;Giammanco, A.;Correa Martins, M.;Mercadante, P.G.;Petkov, P.;Asawatangtrakuldee, C.;Antunovic, Z.;Morovic, S.;Mousa, J.;Tuominiemi, J.;Nayak, A.;Calligaris, L.;Costanza, F.;Geiser, A.;Petrukhin, A.;Raspereza, A.;Hidas, P.;Horvath, D.;Trocsanyi, Z.L.;Dhingra, N.;Sharma, V.;Choudhury, R.K.;Shukla, P.;De Palma, M.;Maggi, G.;Braibant-Giacomelli, S.;Fabbri, F.;Manzoni, R.A.;Carrillo Montoya, C.A.;Ronchese, P.;Nourbakhsh, S.;Biino, C.;Maselli, S.;Son, D.C.;Kim, H.;Shah, M.A.;Gninenko, S.;Vlasov, E.;Bayshev, I.;Gomez, G.;Frisch, B.;Georgiou, G.;Sphicas, P.;Horisberger, R.;Rohe, T.;Buchmann, M.A.;Chanon, N.;Nägeli, C.;Sanchez, A.K.;Chang, Y.H.;Chang, P.;Lei, Y.J.;Dumanoglu, I.;Hall, G.;Liu, H.;Sperka, D.;Heintz, U.;Conway, R.;Dolen, J.;Clare, R.;Giordano, F.;Cerati, G.B.;Holzner, A.;Sudano, E.;Spiropulu, M.;Timciuc, V.;Vogel, H.;Alexander, J.;Freeman, J.;Harris, R.M.;Hirschauer, J.;Leonidopoulos, C.;Sexton-Kennedy, E.;Uplegger, L.;Rinkevicius, A.;Johnson, K.F.;Albayrak, E.A.;Kenny Iii, R.P.;Lange, D.;Butz, E.;Luckey, P.D.;Wenger, E.A.;Rahmat, R.;Malbouisson, H.;Ruchti, R.;Olsen, J.;Quan, X.;Ecklund, K.M.;Demortier, L.;Arora, S.;Contreras-Campana, C.;Lath, A.;Spanier, S.;York, A.;Osipenkov, I.;Belknap, D.;Friis, E.
Contributors:	理學院物理學系
Keywords:	CMS;Physics
Date:	2013-03-26
Issue Date:	2026-04-23 13:07:59 (UTC+8)
Publisher:	United States: Elsevier B.V
Abstract:	摘要： Results are presented of a search for compositeness in electrons and muons using a data sample of pp collisions at a center-of-mass energy s=7 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 5.0 fb−1. Excited leptons (ℓ⁎) are assumed to be produced via contact interactions in conjunction with a standard model lepton and to decay via ℓ⁎→ℓγ, yielding a final state with two energetic leptons and a photon. The number of events observed in data is consistent with that expected from the standard model. The 95% confidence upper limits for the cross section for the production and decay of excited electrons (muons), with masses ranging from 0.6 to 2 TeV, are 1.48 to 1.24 fb (1.31 to 1.11 fb). Excited leptons with masses below 1.9 TeV are excluded for the case where the contact interaction scale equals the excited lepton mass. The limits on the cross sections are the most stringent ones published to date. 出版者： United States: Elsevier B.V 出版日期： 2013-03-26 出處： Physics letters. B, 2013-03, Vol.720 (4-5), p.309-329 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.2013.02.031
Appears in Collections:	[Department of Physics] journal & Dissertation

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