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Abstract: The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d^t)(d^t) and chromomagnetic (?^t)(?^t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb-1. The linearized variable A(1)FBAFB(1) is used to approximate the asymmetry. Candidate tt¯tt¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for tt¯tt¯ final states. The values found for the parameters are A(1)FB=0.048+0.095?0.087(stat)+0.020?0.029(syst),?^t=?0.024+0.013?0.009(stat)+0.016?0.011(syst),AFB(1)=0.048?0.087+0.095(stat)?0.029+0.020(syst),?^t=?0.024?0.009+0.013(stat)?0.011+0.016(syst), and a limit is placed on the magnitude of ??d^t??|d^t|< 0.03 at 95% confidence level.
Fuente: Journal of High Energy Physics, Vol. 2020, Num. 06, Art. Num. 146
Publisher: Springer Verlag
Publication date: 01/06/2020
No. of pages: 56
Publication type: Article
DOI: 10.1007/JHEP06(2020)146
ISSN: 1126-6708,1029-8479
Publication Url: https://doi.org/10.1007/JHEP06(2020)146
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
ANDREA GARCIA ALONSO
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LORENZO RUSSO
LUCA SCODELLARO
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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