Search for pair produced fourth-generation up-type quarks in pp collisions at √s=7 TeV with a lepton in the final state

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/106777

Title:	Search for pair produced fourth-generation up-type quarks in pp collisions at √s=7 TeV with a lepton in the final state
Authors:	林宗泰;Chatrchyan, S.;Roland, B.;Liao, J.;Souza, M.H.G.;Malek, M.;Ban, Y.;Mahmoud, M.A.;Besancon, M.;Fabbro, B.;Ferri, F.;Beaudette, F.;Chasserat, J.;Kreuzer, P.;Papacz, P.;Reithler, H.;Calligaris, L.;Costanza, F.;Geiser, A.;Petrukhin, A.;Raspereza, A.;Böser, C.;Saini, L.K.;Malhotra, S.;Banerjee, S.;Shukla, P.;Venditti, R.;Gonzi, S.;Colafranceschi, S.;Di Matteo, L.;Bisello, D.;Nespolo, M.;Saha, A.;Bagliesi, G.;Tenchini, R.;Rahatlou, S.;Soffi, L.;Demaria, N.;Potenza, A.;Penzo, A.;Kong, D.J.;Ro, S.R.;Moon, D.H.;Reucroft, S.;Asghar, M.I.;Shmatov, S.;Golubev, N.;Pashenkov, A.;Dremin, I.;Vinogradov, A.;Arce, P.;Cerrada, M.;Fernandez Menendez, J.;Folgueras, S.;Bloch, P.;Camporesi, T.;Govoni, P.;Lee, Y.-J.;De Visscher, S.;Ivova Rikova, M.;Eskut, E.;Gülmez, E.;Brooke, J.J.;Flacher, H.;Colling, D.;Dauncey, P.;Khan, A.;Fantasia, C.;Conway, J.;Kopecky, A.;Hanson, G.;Flowers, K.;Newman, H.B.;Ford, W.T.;Stenson, K.;Kreis, B.;Tucker, J.;Marraffino, J.M.;Newman-Holmes, C.;Prokofyev, O.;Vidal, R.;Johnson, K.F.;Bai, Y.;Varelas, N.;Albayrak, E.A.;Murray, M.;Hahn, K.A.;Yilmaz, Y.;Zanetti, M.;Dahmes, B.;Claes, D.R.;Karmgard, D.J.;Wayne, M.;Piroué, P.;Barker, A.;Flanagan, W.;Snook, B.;Balazs, M.;Friis, E.;Ojalvo, I.;Ross, I.
Contributors:	理學院物理學系
Date:	2012-12-05
Issue Date:	2026-04-23 13:41:58 (UTC+8)
Publisher:	United States: Elsevier
Abstract:	摘要： The results of a search for the pair production of a fourth-generation up-type quark (t') in proton-proton collisions at sqrt(s) = 7 TeV are presented, using data corresponding to an integrated luminosity of about 5.0 inverse femtobarns collected by the Compact Muon Solenoid experiment at the LHC. The t' quark is assumed to decay exclusively to a W boson and a b quark. Events with a single isolated electron or muon, missing transverse momentum, and at least four hadronic jets, of which at least one must be identified as a b jet, are selected. No significant excess of events over standard model expectations is observed. Upper limits for the t' anti-t' production cross section at 95% confidence level are set as a function of t' mass, and t'-quark production for masses below 570 GeV is excluded. The search is equally sensitive to nonchiral heavy quarks decaying to Wb. In this case, the results can be interpreted as upper limits on the production cross section times the branching fraction to Wb. 出版者： United States: Elsevier 出版日期： 2012-12-05 出處： Physics Letters. Section B, 2012-12, Vol.718 (2), p.307-328 資源來源： Elsevier ScienceDirect Journals Complete 識別號： ISSN: 0370-2693 識別號： DOI: 10.1016/j.physletb.2012.10.038
Appears in Collections:	[Department of Physics] journal & Dissertation

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