Measurement of the tt¯ charge asymmetry in events with highly Lorentz-boosted top quarks in pp collisions at √s = 13 TeV
Abstract
The measurement of the charge asymmetry in top quark pair events with highly Lorentz-boosted top quarks decaying to a single lepton and jets is presented. The analysis is performed using proton-proton collisions at √s = 13 TeV with the CMS detector at the LHC and corresponding to an integrated luminosity of 138 fb⁻¹. The selection is optimized for top quarks produced with large Lorentz boosts, resulting in nonisolated leptons and overlapping jets. The top quark charge asymmetry is measured for events with a tt¯ invariant mass larger than 750 GeV and corrected for detector and acceptance effects using a binned maximum likelihood fit. The measured top quark charge asymmetry of (0.42₋₀.₆₉⁺⁰.⁶⁴) is in good agreement with the standard model prediction at next-to-next-to-leading order in quantum chromodynamic perturbation theory with next-to-leading-order electroweak corrections. The result is also presented for two invariant mass ranges, 750–900 and >900 GeV. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000637794Publication status
publishedExternal links
Journal / series
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy PhysicsVolume
Pages / Article No.
Publisher
American Physical SocietySubject
CMS; Top quarkOrganisational unit
03904 - Wallny, Rainer / Wallny, Rainer
03593 - Dissertori, Günther / Dissertori, Günther
09720 - de Cosa, Annapaola / de Cosa, Annapaola
Funding
758316 - Majorana neutrino discovery strategy with CMS (EC)
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