Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in in pp collisions at root s=13 TeV
File(s)Sirunyan2020_Article_MeasurementOfTheTopQuarkForwar.pdf (1.11 MB)
Published version
Author(s)
Type
Journal Article
Abstract
The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d^t) and chromomagnetic (μ^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)FB is used to approximate the asymmetry. Candidate 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¯ final states. The values found for the parameters are A(1)FB=0.048+0.095−0.087(stat)+0.020−0.029(syst),μ^t=−0.024+0.013−0.009(stat)+0.016−0.011(syst), and a limit is placed on the magnitude of ∣∣d^t∣∣< 0.03 at 95% confidence level.
Date Issued
2020-06-24
Date Acceptance
2020-05-20
Citation
The Journal of High Energy Physics, 2020, 2020 (6), pp.1-56
ISSN
1029-8479
Publisher
IOP Publishing
Start Page
1
End Page
56
Journal / Book Title
The Journal of High Energy Physics
Volume
2020
Issue
6
Copyright Statement
© 2020 The Author(s). This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
License URL
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000567610600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
Hadron-Hadron scattering (experiments)
Top physics
CHARGE ASYMMETRY
PAIR PRODUCTION
COUPLINGS
Publication Status
Published
Article Number
ARTN 146
Date Publish Online
2020-06-24