Search for CP violation in t(t)over-bar production and decay in proton-proton collisions at root s=8 TeV
JOURNAL OF HIGH ENERGY PHYSICS, vol.2017, no.3, 2017 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 2017 Issue: 3
- Publication Date: 2017
- Doi Number: 10.1007/jhep03(2017)101
- Journal Name: JOURNAL OF HIGH ENERGY PHYSICS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Keywords: CP violation, Hadron-Hadron scattering (experiments), Top physics
- Istanbul University Affiliated: No
Abstract
The results of a first search for CP violation in the production and decay of top quark-antiquark (t (t) over bar) 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 root s = 8 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7fb(-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 t (t) over bar production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model.