Measurement of the mass difference between top quark and antiquark in pp collisions at
The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (Δmt = mt – mt-) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron and at least four jets in the final state. The analysis is based on data corresponding to an integrated luminosity of 19.6 fb–1 fb–1collected by the CMS experiment at the LHC, and yields a value of Δmt = –0.15 ± 0.19(stat) ± 0.09(syst) GeV, which is consistent with the SM expectation. Finally, this result is significantly more precise than previously reported measurements.
- 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:
- 1352459
- Alternate ID(s):
- OSTI ID: 1336410
- Report Number(s):
- FERMILAB-PUB-16-592-CMS; CMS-TOP-12-031; CERN-EP-2016-249; arXiv:1610.09551; S0370269317303027; PII: S0370269317303027
- Journal Information:
- Physics Letters. B, Journal Name: Physics Letters. B Vol. 770 Journal Issue: C; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
Web of Science
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