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Title

Measurements of charge and CP asymmetries in b -hadron decays using top-quark events collected by the ATLAS detector in pp collisions at √s = 8 TeV

CollaborationWith : Ancu, Lucian Stefan / Bilbao De Mendizabal, Javier / Calace, Noemi / Chatterjee, Avishek / Clark, Allan Geoffrey / Coccaro, Andrea / Delitzsch, Chris Malena / Della Volpe, Domenico / Ferrere, Didier / Golling, Tobias / Gonzalez Sevilla, Sergio / Gramling, Johanna Léna / Guescini, Francesco / Iacobucci, Giuseppe / Katre, Akshay / Khoo, Teng Jian / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nackenhorst, Olaf / Nessi, Marzio / Paolozzi, Lorenzo / Ristic, Branislav / Schramm, Steven / Sfyrla, Anna / Wu, Xin
Published in Journal of High Energy Physics. 2017, vol. 1702, p. 071-120
Collection SCOAP3
Abstract Same- and opposite-sign charge asymmetries are measured in lepton+jets t t ¯ $$ t\overline{t} $$ events in which a b -hadron decays semileptonically to a soft muon, using data corresponding to an integrated luminosity of 20.3 fb −1 from proton-proton collisions at a centre-of-mass energy of √s = 8 TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. The charge asymmetries are based on the charge of the lepton from the top-quark decay and the charge of the soft muon from the semileptonic decay of a b -hadron and are measured in a fiducial region corresponding to the experimental acceptance. Four CP asymmetries (one mixing and three direct) are measured and are found to be compatible with zero and consistent with the Standard Model.
Keywords Hadron-Hadron scattering (experiments)
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arXiv: 1610.07869
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ATLAS COLLABORATION. Measurements of charge and CP asymmetries in b -hadron decays using top-quark events collected by the ATLAS detector in pp collisions at √s = 8 TeV. In: Journal of High Energy Physics, 2017, vol. 1702, p. 071-120. https://archive-ouverte.unige.ch/unige:92237

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Deposited on : 2017-03-01

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