Search for new physics in top quark production with additional leptons in proton-proton collisions at root s=13 TeV using effective field theory
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Events containing one or more top quarks produced with additional prompt leptons are used to search for new physics within the framework of an effective field theory (EFT). The data correspond to an integrated luminosity of 41.5 fb−1 of proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, collected by the CMS experiment in 2017. The selected events are required to have either two leptons with the same charge or more than two leptons; jets, including identified bottom quark jets, are also required, and the selected events are divided into categories based on the multiplicities of these objects. Sixteen dimension-six operators that can affect processes involving top quarks produced with additional charged leptons are considered in this analysis. Constructed to target EFT effects directly, the analysis applies a novel approach in which the observed yields are parameterized in terms of the Wilson coefficients (WCs) of the EFT operators. A simultaneous fit of the 16 WCs to the data is performed and two standard deviation confidence intervals for the WCs are extracted; the standard model expectations for the WC values are within these intervals for all of the WCs probed.
Date Issued
2021-03-09
Date Acceptance
2021-01-25
Citation
The Journal of High Energy Physics, 2021, 2021 (3), pp.1-54
ISSN
1029-8479
Publisher
IOP Publishing
Start Page
1
End Page
54
Journal / Book Title
The Journal of High Energy Physics
Volume
2021
Issue
3
Copyright Statement
© 2021 CERN, for the benefit of the CMS Collaboration. 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.
License URL
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000628216000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
Beyond Standard Model
Hadron-Hadron scattering (experiments)
Top physics
Publication Status
Published
Article Number
ARTN 95
Date Publish Online
2021-03-09