CMS-PAS-TOP-21-014

CMS-PAS-TOP-21-014
Measurement of the $\mathrm{t\bar{t}}$ charge asymmetry in highly boosted events in the single-lepton channel at 13 TeV
CMS Collaboration
May 2022

Abstract: The measurement of the charge asymmetry for highly boosted top quark pairs decaying to a single lepton and jets is presented. The analysis is performed using 138 fb$^{-1}$ of data collected in pp collisions at $\sqrt{s}= $ 13 TeV with the CMS detector during Run 2 of the Large Hadron Collider. The selection is optimized for top quark-antiquark pairs produced with large Lorentz boosts, resulting in non-isolated leptons and overlapping jets. The top quark charge asymmetry is measured for events with $\mathrm{t\bar{t}}$ 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 is in good agreement with the standard model prediction at next-to-next-to-leading order in perturbation theory with next-to-leading order electroweak corrections. Differential distributions for two invariant mass ranges are also presented.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, PLB 846 (2023) 137703. The superseded preliminary plots can be found here.

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