Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/7318
Title: Measurement of the W-boson helicity in top-quark decays from tt¯ production in lepton+jets events in pp collisions at?s = 7 TeV Th
Authors: CMS Collaboration
Karapınar, Güler
Keywords: Quark production
Quarks
Large Hadron Collider (LHC)
CMS detector
Issue Date: Oct-2013
Publisher: Springer Verlag
Source: Chatrchyan, S., Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., ...CMS Collaboration (2013). Measurement of the W-boson helicity in top-quark decays from tt̄ production in lepton+jets events in pp collisions at√s = 7 TeV Th. Journal of High Energy Physics, 2013(10). doi:10.1007/JHEP10(2013)167
Abstract: The W-boson helicity fractions in top-quark decays are measured with tt̄ events in the lepton+jets final state, using proton-proton collisions at a centre-of-mass energy of 7TeV, collected in 2011 with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 5.0 fb -1. The measured fractions of longitudinal, left-, and right-handed helicity are F0 = 0:682±0:030 (stat.)± 0:033 (syst.), F= 0:310 ±0:022 (stat.)± 0:022 (syst.), and F= 0:008± 0:012 (stat.) ± 0:014 (syst.), consistent with the standard model predictions. The measured fractions are used to probe the existence of anomalous Wtb couplings. Exclusion limits on the real components of the anomalous couplings gL; gR are also derived.
URI: https://doi.org/10.1007/JHEP10(2013)167
https://hdl.handle.net/11147/7318
ISSN: 1029-8479
1029-8479
Appears in Collections:Mathematics / Matematik
Rectorate / Rektörlük
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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