Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at √s=7 TeV

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题名:	Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at √s=7 TeV
作者:	余欣珊;Chatrchyan, S.;Lellouch, J.;Walsh, S.;Grégoire, G.;Beliy, N.;Genchev, V.;Morovic, S.;Mahmoud, M.A.;Kadastik, M.;Lassila-Perini, K.;Tuominiemi, J.;Sillou, D.;Beauceron, S.;Spiridonov, A.;Chwalek, T.;Katkov, I.;Quast, G.;Krajczar, K.;Gomber, B.;Aziz, T.;Mohanty, G.B.;Hesari, H.;Pompili, A.;Abbiendi, G.;Barbagli, G.;Lista, L.;Bisello, D.;Dosselli, U.;Menichelli, M.;Palmonari, F.;Demaria, N.;Kim, J.Y.;Kang, S.;Park, I.C.;Martisiute, D.;Gallinaro, M.;Dermenev, A.;Safronov, G.;Perfilov, M.;Uzunian, A.;Albajar, C.;Gomez, G.;Lopez Virto, A.;DʼEnterria, D.;Hoffmann, H.F.;Lenzi, P.;Malgeri, L.;Spiga, D.;Horisberger, R.;Sibille, J.;Chanon, N.;Lecomte, P.;Moortgat, F.;Treille, D.;Urscheler, C.;Weng, J.;Yalvac, M.;Olaiya, E.;Womersley, W.J.;Iles, G.;Papageorgiou, A.;Tourneur, S.;Virdee, T.;Martin, W.;Heister, A.;Lawson, P.;Luk, M.;Farrell, C.;Long, O.R.;Ranieri, R.;Barge, D.;Stuart, D.;Bunn, J.;Teo, W.D.;Burkett, K.;Muniz, L.;Zakaria, M.;Haas, J.;Prosper, H.;Veeraraghavan, V.;Cavanaugh, R.;Khalatyan, S.;Zhukova, V.;Baur, U.;Brinkerhoff, A.;Kolb, J.;Luo, W.;Laird, E.;Mendez, H.;Laasanen, A.T.;Zablocki, J.;Chung, Y.S.;Garcia-Bellido, A.;Somalwar, S.;Spanier, S.;Osipenkov, I.;Akchurin, N.;Dudero, P.R.;Melo, A.;Sheldon, P.
贡献者:	理學院物理學系
关键词:	CMS;Exact sciences and technology;Nuclear physics;Physics;The physics of elementary particles and fields;Top quark
日期:	2012-03-13
上传时间:	2026-04-23 12:12:44 (UTC+8)
出版者:	Kidlington: Elsevier B.V
摘要:	摘要： The difference in angular distributions between top quarks and antiquarks, commonly referred to as the charge asymmetry, is measured in pp collisions at the LHC with the CMS experiment. The data sample corresponds to an integrated luminosity of 1.09 fb−1 at a centre-of-mass energy of 7 TeV. Top-quark pairs are selected in the final state with an electron or muon and four or more jets. At least one jet is identified as originating from b-quark hadronization. The charge asymmetry is measured in two variables, one based on the pseudorapidities (η) of the top quarks and the other on their rapidities (y). The results ACη=−0.017±0.032 (stat.)−0.036+0.025(syst.) and ACy=−0.013±0.028 (stat.)−0.031+0.029(syst.) are consistent within uncertainties with the standard-model predictions. 出版者： Kidlington: Elsevier B.V 出版日期： 2012-03-13 出處： Physics letters. B, 2012-03, Vol.709 (1-2), p.28-49 資源來源： Elsevier ScienceDirect Journals Complete - AutoHoldings 版權： 2012 CERN 版權： 2015 INIST-CNRS 識別號： ISSN: 0370-2693 識別號： EISSN: 1873-2445 識別號： DOI: 10.1016/j.physletb.2012.01.078 識別號： CODEN: PYLBAJ
显示于类别:	[物理學系] 期刊論文

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