CMS-PAS-TOP-16-001

CMS-PAS-TOP-16-001
Search for CP violation in top-pair events with lepton+jets channel at $\sqrt{s} =$ 8TeV
CMS Collaboration
March 2016

Abstract: We present the first measurement at the LHC of CP-violation asymmetries in $\mathrm{ t \bar{t} }$ events based on the T-odd triple product correlations. The analyzed data are collected by the CMS experiment from pp collisions at a center-of-mass energy $\sqrt{s} =$ 8 TeV and correspond to an integrated luminosity of 19.7 fb $^{-1}$ . The T-odd observables are measured using the linearly independent four-momentum vectors associated with the top quark production and decay. The measured asymmetries show no evidence for CP-violation effects in $\mathrm{ t \bar{t} }$ events, in agreement with the standard model prediction.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; These preliminary results are superseded in this paper, JHEP 03 (2017) 101. The superseded preliminary plots can be found here.

CMS Publications