Header

UZH-Logo

Maintenance Infos

Search for CP violation in $t\overline{t}$ production and decay in proton-proton collisions at $\sqrt{s}=8$ TeV


Abstract

The results of a first search for CP violation in the production and decay of top quark-antiquark $t\overline{t}$ 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 $\sqrt{s}=8$ 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 $t\overline{t}$ production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model.

Abstract

The results of a first search for CP violation in the production and decay of top quark-antiquark $t\overline{t}$ 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 $\sqrt{s}=8$ 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 $t\overline{t}$ production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model.

Statistics

Altmetrics

Downloads

2 downloads since deposited on 11 Dec 2017
2 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2017
Deposited On:11 Dec 2017 14:17
Last Modified:18 Dec 2017 15:56
Publisher:Springer
ISSN:1029-8479
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP03(2017)101

Download

Download PDF  'Search for CP violation in $t\overline{t}$ production and decay in proton-proton collisions at $\sqrt{s}=8$ TeV'.
Preview
Content: Published Version
Filetype: PDF
Size: 602kB
View at publisher
Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)