Observation of top quark pairs produced in association with a vector boson in pp collisions at √s = 8 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105541

Title:	Observation of top quark pairs produced in association with a vector boson in pp collisions at √s = 8 TeV
Authors:	余欣珊;Tavernier, S.;Brun, H.;Caillol, C.;Clerbaux, B.;Seva, T.;Zenoni, F.;Crucy, S.;Poyraz, D.;Popov, A.;Beliy, N.;Da Costa, E. M.;Mercadante, P. G.;Romero Abad, D.;Chen, M.;Attikis, A.;Radi, A.;Raidal, M.;Faure, J. L.;Conte, E.;Depasse, P.;Lipka, K.;Pitzl, D.;Roland, B.;Nowatschin, D.;Chwalek, T.;Kyriakis, A.;Saoulidou, N.;Tziaferi, E.;Paradas, E.;Karancsi, J.;Kumar, Ashok;Garg, R. B.;Majumdar, N.;Kumar, V.;Sarkar, T.;Chauhan, S.;Fahim, A.;Pugliese, G.;Gori, V.;Buontempo, S.;Lista, L.;Ciangottini, D.;Foà, L.;Traczyk, P.;Finco, L.;Pastrone, N.;Sacchi, R.;Komaragiri, J. R.;Hoorani, H. R.;Gavrilenko, M.;Zarubin, A.;Safronov, G.;Vinogradov, A.;Cerrada, M.;Piedra Gomez, J.;Bendavid, J.;du Pree, T.;Racz, A.;Steggemann, J.;Takahashi, Y.;Meister, D.;Adiguzel, A.;Demiroglu, Z. S.;Zeyrek, M.;Poll, A.;Bell, K. W.;Brown, R. M.;Cockerill, D. J. A.;Petyt, D.;Citron, M.;Lawson, P.;Rohlf, J.;Sinthuprasith, T.;Cox, P. T.;Suarez, I.;Rinkevicius, A.;Gottschalk, E.;Hasegawa, S.;McBride, P.;Merkel, P.;Rakness, G.;Adams, J. R.;Ogul, H.;Makouski, M.;Toda, S.;Mignerey, A. C.;Velicanu, D.;Kubota, Y.;Wang, R.-J.;Palmer, C.;Shi, X.;Chen, Z.;Contreras-Campana, E.;Riley, G.;Perloff, A.;Ni, H.;Wang, Y.;Dasu, S.;Hervé, A.;Loveless, R.
Contributors:	理學院物理學系
Keywords:	Classical and Quantum Gravitation;Elementary Particles;Physics;Physics and Astronomy;Quantum Field Theories;Quantum Field Theory;Quantum Physics;Regular Article - Experimental Physics;Relativity Theory;String Theory
Date:	2016-01-01
Issue Date:	2026-04-23 12:35:01 (UTC+8)
Publisher:	Berlin/Heidelberg: Springer Berlin Heidelberg
Abstract:	摘要： A bstract Measurements of the cross sections for top quark pairs produced in association with a W or Z boson are presented, using 8 TeV pp collision data corresponding to an integrated luminosity of 19.5 fb −1 , collected by the CMS experiment at the LHC. Final states are selected in which the associated W boson decays to a charged lepton and a neutrino or the Z boson decays to two charged leptons. Signal events are identified by matching reconstructed objects in the detector to specific final state particles from t t ¯ W or t t ¯ Z decays. The t t ¯ W cross section is measured to be 382 − 102 + 117 fb with a significance of 4.8 standard deviations from the background-only hypothesis. The t t ¯ Z cross section is measured to be 242 − 55 + 65 fb with a significance of 6.4 standard deviations from the background-only hypothesis. These measurements are used to set bounds on five anomalous dimension-six operators that would affect the t t ¯ W and t t ¯ Z cross sections. 其他題名： J. High Energ. Phys 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2016-01-18 出處： The journal of high energy physics, 2016-01, Vol.2016 (1) 資源來源： Publicly Available Content Database 版權： The Author(s) 2016 識別號： EISSN: 1029-8479 識別號： DOI: 10.1007/JHEP01(2016)096
Appears in Collections:	[Department of Physics] journal & Dissertation

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