Search for CP violation in $$t\bar{t}$$ production and decay in proton-proton collisions at $$\sqrt{s}$$ = 8 TeV
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.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- The CMS collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1334971
- Report Number(s):
- FERMILAB-PUB-16-580-CMS; CMS-TOP-16-001; CERN-EP-2016-266; arXiv:1611.08931; CMS-TO-16-001; 1500513
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2017, Issue 3; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Tests of discrete symmetries
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journal | November 2019 |
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