The results of a first search for CP violation in the production and decay of top quark-antiquark (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√=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¯ production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model.
Titolo: | Search for CP violation in t t-bar production and decay in proton-proton collisions at sqrt(s) = 8 TeV |
Autori: | |
Data di pubblicazione: | 2017 |
Stato di pubblicazione: | Pubblicato |
Rivista: | |
Abstract: | The results of a first search for CP violation in the production and decay of top quark-antiquark (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√=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¯ production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model. |
Handle: | http://hdl.handle.net/11368/2897833 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/JHEP03(2017)101 |
URL: | http://link.springer.com/article/10.1007%2FJHEP03%282017%29101 |
Appare nelle tipologie: | 1.1 Articolo in Rivista |
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