Measurement of the mass difference between top quark and antiquark in pp collisions at sqrt(s) = 8 TeV

Abstract

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 (Delta m[t] = m[t] - m[t-bar]) 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 inverse femtobarns collected by the CMS experiment at the LHC, and yields a value of Delta m[t] = -0.15 +/- 0.19 (stat) +/- 0.09 (syst) GeV, which is consistent with the SM expectation. This result is significantly more precise than previously reported measurements.

Replaced with the published version. Added the journal reference. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-12-031/index.html

References in corpus (11)

• PYTHIA 6.4 Physics and Manual
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Implications of CTEQ global analysis for collider observables
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Measurement of the top quark mass in the $t\bar{t}\to$ dilepton channel from $\sqrt{s}=8$ TeV ATLAS data
• Measurement of the Mass and Width of the W Boson in e+e- Collisions at sqrt{s} = 161 - 209 GeV
• Measurement of the mass difference between $t$ and $\bar{t}$ quarks
• Measurement of the production cross section of a W boson in association with two b jets in pp collisions at sqrt(s) = 8 TeV

Cited by in corpus (7)

• Measurement of the mass difference and the binding energy of the hypertriton and antihypertriton
• Top-Quark Physics: Status and Prospects
• Measurement of the top quark mass using events with a single reconstructed top quark in pp collisions at $\sqrt{s}$ = 13 TeV
• From the Bottom to the Top -- Reconstruction of $t\bar{t}$ Events with Deep Learning
• Combination of D0 measurements of the top quark mass
• Review of top quark mass measurements in CMS
• Application of Gene Expression Programming in Improving the Event Selection of the Semi-leptonic Top Quark Pair Process