Search for CP violation in t(t)over-bar production and decay in proton-proton collisions at root s=8 TeV
Type :
Article
Publication Status :
published
Access :
restrictedAccess
Abstract
The results of a first search for CP violation in the production and decay of top quark-antiquark ( tt¯tt¯ ) pairs are presented. The search is based on asymmetries in T-odd, triple-product correlation observables, where T is the time-reversal operator. The analysis uses a sample of proton-proton collisions at s√=8s=8 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb−1. Events are selected having one electron or muon and at least four jets. The T-odd observables are measured using four-momentum vectors associated with tt¯tt¯ production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model.
Source :
Journal Of High Energy Physics
Date :
2017
Publisher :
Springer International
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