Document Type
Article
Publication Title
Journal of High Energy Physics
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.
DOI
10.1007/JHEP12(2015)178
Publication Date
2015
Recommended Citation
The CMS collaboration., Khachatryan, V., Sirunyan, A.M. et al. Search for a light charged Higgs boson decaying to in pp collisions at TeV. J. High Energ. Phys. 2015, 1–37 (2015). https://doi.org/10.1007/JHEP12(2015)178
