Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at √s = 7 TeV

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题名:	Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at √s = 7 TeV
作者:	林宗泰;Blyweert, S.;Maes, M.;Olbrechts, A.;Mohammadi, A.;Strobbe, N.;Piperov, S.;Antunovic, Z.;Tuuva, T.;Chierici, R.;Wittmer, B.;Pieta, H.;Calligaris, L.;Jung, H.;Lutz, B.;Riedl, C.;Haller, J.;Peiffer, T.;Schum, T.;Troendle, D.;Usai, E.;Dierlamm, A.;Ulrich, R.;Horvath, D.;Ujvari, B.;Dutta, D.;Parida, B.;Benvenuti, A. C.;Guiducci, L.;Chiorboli, M.;Piccolo, D.;Musenich, R.;Fiorendi, S.;Govoni, P.;Pedrini, D.;Biasotto, M.;Carlin, R.;Tosi, M.;Zotto, P.;Dell’Orso, R.;Diemoz, M.;Potenza, A.;Oh, Y. D.;Park, H.;Kim, H.;Park, S. K.;Park, C.;Seo, H.;Silverwood, H.;Vorobyev, A.;Golubev, N.;Popov, V.;Snigirev, A.;Azhgirey, I.;Tourtchanovitch, L.;Vázquez, D. Domínguez;Cifuentes, J. A. Brochero;Virto, A. Lopez;Auffray, E.;Meijers, F.;Racz, A.;Segoni, I.;Simon, M.;Kaestli, H. C.;Donegà, M.;Grab, C.;Chang, P.;Kao, K. Y.;Gurpinar, E.;Topaksu, A. Kayis;Karapostoli, G.;Fantasia, C.;Chertok, M.;Gardner, M.;Pilot, J.;Smith, J.;Shrinivas, A.;Wilken, R.;Branson, J. G.;Villalba, R. Magaña;Gottschalk, E.;Kalakhety, H.;Dilsiz, K.;Yoon, A. S.;Zhukova, V.;Klapoetke, K.;Bloom, K.;Kravchenko, I.;Dolen, J.;Pozdnyakov, A.;Stoynev, S.;Bylsma, B.;Lopez, A.;Jung, K.;Wang, F.;Petrillo, G.;Gray, R.;Rekovic, V.;Snook, B.;Polese, G.;Ross, I.
贡献者:	理學院物理學系
关键词:	Classical and Quantum Gravitation;Elementary Particles;High energy physics;Physics;Physics and Astronomy;Quantum Field Theories;Quantum Field Theory;Quantum Physics;Relativity Theory;String Theory
日期:	2014-01-01
上传时间:	2026-04-23 12:15:38 (UTC+8)
出版者:	Berlin/Heidelberg: Springer Berlin Heidelberg
摘要:	摘要： A bstract The production of a Z boson, decaying into two leptons and produced in association with one or more b jets, is studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV. The data were recorded in 2011 with the CMS detector and correspond to an integrated luminosity of 5 fb −1 . The Z( ℓℓ ) + b-jets cross sections (where ℓℓ = μμ or ee) are measured separately for a Z boson produced with exactly one b jet and with at least two b jets. In addition, a cross section ratio is extracted for a Z boson produced with at least one b jet, relative to a Z boson produced with at least one jet. The measured cross sections are compared to various theoretical predictions, and the data favour the predictions in the five-flavour scheme, where b quarks are assumed massless. The kinematic properties of the reconstructed particles are compared with the predictions from the M ad G raph event generator using the pythia parton shower simulation. 其他題名： J. High Energ. Phys 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2014-06-19 出處： The journal of high energy physics, 2014-06, Vol.2014 (6), p.1 資源來源： ProQuest Publicly Available Content Database 版權： The Author(s) 2014 版權： SISSA, Trieste, Italy 2014 識別號： EISSN: 1029-8479 識別號： DOI: 10.1007/JHEP06(2014)120
显示于类别:	[物理學系] 期刊論文

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