Search for CP violation in top quark-antiquark production and decay in proton-proton collisions
博士 === 國立臺灣大學 === 物理學研究所 === 105 === We present the first search for CP violation in top quark-antiquark pair events. The search is based on asymmetries in T-odd triple product correlation observables, where T is the time reversal operator. The analysis is based on a sample of proton-proton collisio...
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| Format: | Others |
| Language: | en_US |
| Published: |
2017
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| Online Access: | http://ndltd.ncl.edu.tw/handle/8z58pa |
| Summary: | 博士 === 國立臺灣大學 === 物理學研究所 === 105 === We present the first search for CP violation in top quark-antiquark pair events. The search is based on asymmetries in T-odd triple product correlation observables, where T is the time reversal operator. The analysis is based on a sample of proton-proton collisions at sqrt(s)=8TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7fb^-1. The analysis is performed with events having exactly one electron or muon and at least four jets. The T-odd observables are measured using the linearly independent four-momentum vectors associated with top quark production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, in agreement with the standard model prediction.
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