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| 題名: | Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at s=8TeV |
| 作者: | 余欣珊;Sirunyan, A.M.;Hartl, C.;Jeitler, M.;Mossolov, V.;Beluffi, C.;Chinellato, J.;Aleksandrov, A.;Liu, Z.;Luukka, P.;Couderc, F.;Faure, J.L.;Baffioni, S.;Buttignol, M.;Chabert, E.C.;Fontaine, J.-C.;Courbon, B.;Lomidze, D.;Heister, A.;Schulte, J.F.;Sonnenschein, L.;Stahl, A.;Costanza, F.;Lobanov, A.;Roland, B.;Stefaniuk, N.;Troendle, D.;Vormwald, B.;Husemann, U.;Papadopoulos, I.;Garg, R.B.;Roy, D.;Jha, V.;Parida, B.;Silvestris, L.;Abbiendi, G.;Brigliadori, L.;Siroli, G.P.;Ragazzi, S.;Lacaprara, S.;Androsov, K.;Organtini, G.;Cho, S.;Yang, U.K.;Olszewski, M.;Seixas, J.;Vorobyev, A.;Zhokin, A.;Rusakov, S.V.;Flix, J.;Dabrowski, A.;De Guio, F.;Dordevic, M.;Gill, K.;Pandolfi, F.;Quittnat, M.;Pinna, D.;Khurana, R.;Gurpinar, E.;Bilmis, S.;Ball, F.;Brew, C.;Burton, D.;Elwood, A.;Futyan, D.;Seez, C.;Henderson, C.;Berry, E.;Jesus, O.;Pellett, D.;Ellison, J.;Cittolin, S.;Welke, C.;Heller, R.;Mccoll, N.;Paulini, M.;Alexander, J.;Rinkevicius, A.;Lincoln, D.;Stoynev, S.;Adams, J.R.;Prosper, H.;Bucinskaite, I.;Durgut, S.;Ozok, F.;Stringer, R.;Abercrombie, D.;Busza, W.;Paus, C.;Fangmeier, C.;Orimoto, T.;Mucia, N.;Bylsma, B.;Elmer, P.;Zuranski, A.;Jha, M.K.;Gershtein, Y.;Heideman, J.;Pakhotin, Y.;Undleeb, S.;Duric, S. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | Anomalous couplings;CMS;Helicity;Physics;Top |
| 日期: | 2016-11-10 |
| 上傳時間: | 2026-04-23 12:21:49 (UTC+8) |
| 出版者: | United States: Elsevier B.V |
| 摘要: | 摘要： The W boson helicity fractions from top quark decays in tt‾ events are measured using data from proton–proton collisions at a centre-of-mass energy of 8TeV. The data were collected in 2012 with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.8fb−1. Events are reconstructed with either one muon or one electron, along with four jets in the final state, with two of the jets being identified as originating from b quarks. The measured helicity fractions from both channels are combined, yielding F0=0.681±0.012(stat)±0.023(syst), FL=0.323±0.008(stat)±0.014(syst), and FR=−0.004±0.005(stat)±0.014(syst) for the longitudinal, left-, and right-handed components of the helicity, respectively. These measurements of the W boson helicity fractions are the most accurate to date and they agree with the predictions from the standard model.
出版者： United States: Elsevier B.V
出版日期： 2016-11-10
出處： Physics letters. B, 2016-11, Vol.762 (C), p.512-534
資源來源： Elsevier ScienceDirect Journals Complete
版權： 2016 The Author
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2016.10.007 |
| 顯示於類別: | [物理學系] 期刊論文
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