Measurement of the W boson helicity in events with a single reconstructed top quark in p p collisions at root s=8 TeVopen access
- Authors
- Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Bergauer, T; Dragicevic, M; Eroe, J; Friedl, M; Fruhwirth, M; Kim, Tae Jeong
- Issue Date
- Jan-2015
- Publisher
- SPRINGER
- Keywords
- Electroweak interaction; Hadron-Hadron Scattering
- Citation
- JOURNAL OF HIGH ENERGY PHYSICS, v.2015, no.1, pp.1 - 35
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HIGH ENERGY PHYSICS
- Volume
- 2015
- Number
- 1
- Start Page
- 1
- End Page
- 35
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/143259
- DOI
- 10.1007/JHEP01(2015)053
- ISSN
- 1126-6708
- Abstract
- A measurement of the W boson helicity is presented, where the W boson originates from the decay of a top quark produced in pp collisions. The event selection, optimized for reconstructing a single top quark in the final state, requires exactly one isolated lepton (muon or electron) and exactly two jets, one of which is likely to originate from the hadronization of a bottom quark. The analysis is performed using data recorded at a center-of-mass energy of 8 TeV with the CMS detector at the CERN LHC in 2012. The data sample corresponds to an integrated luminosity of 19.7 fb(-1). The measured helicity fractions are F-L = 0.298 +/- 0.028 (stat) +/- 0.032(syst), F-0 = 0.720 +/- 0.039 (stat) +/- 0.037(syst), and F-R = -0.018 +/- 0.019 (stat) +/- 0.011(syst). These results are used to set limits on the real part of the tWb anomalous couplings, g(L) and g(R).
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Collections - 서울 자연과학대학 > 서울 물리학과 > 1. Journal Articles
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