Measurement of the t t ¯ production cross section in the eμ channel in proton-proton collisions at √s = 7 and 8 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105334

Title:	Measurement of the t t ¯ production cross section in the eμ channel in proton-proton collisions at √s = 7 and 8 TeV
Authors:	余欣珊;Khachatryan, V.;Besançon, M.;Couderc, F.;Dejardin, M.;Denegri, D.;Fabbro, B.;Faure, J.L.;Favaro, C.;Ferri, F.;Ganjour, S.;Givernaud, A.;Gras, P.;Monchenault, G. Hamel De;Jarry, P.;Locci, E.;Machet, M.;Malcles, J.;Rander, J.;Rosowsky, A.;Titov, M.;Zghiche, A.;Abdulsalam, A.;Antropov, I.;Baffioni, S.;Beaudette, F.;Busson, P.;Cadamuro, L.;Chapon, E.;Charlot, C.;Davignon, O.;Granier de Cassagnac, R.;Jo, M.;Lisniak, S.;Mine, P.;Naranjo, I.N.;Nguyen, M.;Ochando, C.;Ortona, G.;Paganini, P.;Pigard, P.;Regnard, S.;Salerno, R.;Sirois, Y.;Strebler, T.;Yilmaz, Y.;Zabi, A.;Agram, J.-L.;Andrea, J.;Aubin, A.;Bloch, D.;Brom, J.-M.;Buttignol, M.;Chabert, E.C.;Chanon, N.;Collard, C.;Conte, E.;Coubez, X.;Fontaine, J.-C.;Gele, D.;Goerlach, U.;Goetzmann, C.;Bihan, A.-C. Le;Merlin, J.A.;Skovpen, K.;Hove, P. Van;Gadrat, S.;Beauceron, S.;Bernet, C.;Boudoul, G.;Bouvier, E.;Montoya, C.A. Carrillo;Chierici, R.;Contardo, D.;Courbon, B.;Depasse, P.;Mamouni, H. El;Fan, J.;Fay, J.;Gascon, S.;Gouzevitch, M.;Ille, B.;Lagarde, Fabienne;Laktineh, I.B.;Lethuillier, M.;Mirabito, L.;Pequegnot, A.L.;Perries, S.;Popov, A.;Alvarez, J.D. Ruiz;Sabes, D.;Sordini, V.;Donckt, M. Vander;Verdier, P.;Viret, S.
Contributors:	理學院物理學系
Keywords:	High Energy Physics - Experiment;Physics
Date:	2016-08-01
Issue Date:	2026-04-23 12:18:32 (UTC+8)
Publisher:	Springer
Abstract:	摘要： The inclusive cross section for top quark pair production is measured in proton-proton collisions at sqrt(s) = 7 and 8 TeV, corresponding to 5.0 and 19.7 invers-femtobarns, respectively, with the CMS experiment at the LHC. The cross sections are measured in the electron-muon channel using a binned likelihood fit to multi-differential final state distributions related to identified b quark jets and other jets in the event. The measured cross section values are 173.6 +/- 2.1 (stat) +4.5-4.0 (syst) +/- 3.8 (lumi) pb at sqrt(s) = 7 TeV, and 244.9 +/- 1.4 (stat) +6.3-5.5 (syst) +/- 6.4 (lumi) pb at sqrt(s) = 8 TeV, in good agreement with QCD calculations at next-to-next-to-leading-order accuracy. The ratio of the cross sections measured at 7 and 8 TeV is determined, as well as cross sections in the fiducial regions defined by the acceptance requirements on the two charged leptons in the final state. The cross section results are used to determine the top quark pole mass via the dependence of the theoretically predicted cross section on the mass, giving a best result of 173.8 +1.7-1.8 GeV. The data at sqrt(s) = 8 TeV are also used to set limits, for two neutralino mass values, on the pair production of supersymmetric top squarks with masses close to the top quark mass. 出版者： Springer 出版日期： 2016 出處： The journal of high energy physics, 2016 資源來源： Publicly Available Content Database 版權： CC0 1.0 - Universal 識別號： ISSN: 1126-6708 識別號： EISSN: 1029-8479 識別號： DOI: 10.1007/JHEP08(2016)029
Appears in Collections:	[Department of Physics] journal & Dissertation

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