Measurement of the mass difference between top and antitop quarks

Abstract

A measurement of the mass difference between the top and the antitop quark (Delta m(t) = m(t) - m(anti-t)) is performed using events with a muon or an electron and at least four jets in the final state. The analysis is based on data collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.96 +/- 0.11 inverse femtobarns, and yields the value of Delta m(t) = -0.44 +/- 0.46 (stat) +/- 0.27 (syst) GeV. This result is consistent with equality of particle and antiparticle masses required by CPT invariance, and provides a significantly improved precision relative to existing measurements.

Submitted to the Journal of High Energy Physics

References in corpus (12)

• 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
• MCFM for the Tevatron and the LHC
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• Measurement of the t t-bar Production Cross Section in pp Collisions at 7 TeV in Lepton + Jets Events Using b-quark Jet Identification
• Measurement of the Mass and Width of the W Boson in e+e- Collisions at sqrt{s} = 161 - 209 GeV
• Systematic Errors: facts and fictions
• Precise measurement of the top quark mass from lepton+jets events at D0
• Top Quark Mass Measurement in the Lepton + Jets Channel Using a Matrix Element Method and in situ Jet Energy Calibration
• Measurement of the top quark mass in the lepton+jets channel using the Ideogram Method
• Measurement of the mass difference between $t$ and $\bar{t}$ quarks

Cited by in corpus (12)

• Combination of the top-quark mass measurements from the Tevatron collider
• Measurement of the top-quark mass in t t-bar events with lepton+jets final states in pp collisions at sqrt(s) = 7 TeV
• Top-Quark Physics: Status and Prospects
• Spontaneous breaking of Lorentz symmetry in $(2+\epsilon )$-dimensional QED
• The Top Quark
• Top-quark physics at the Large Hadron Collider
• Measurement of the mass difference between top quark and antiquark in pp collisions at sqrt(s) = 8 TeV
• Measurement of the Mass Difference Between Top and Anti-top Quarks at CDF
• Measurement of the mass difference between top and anti-top quarks in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
• CPT analysis with top physics
• Recent results on Top quark Physics with the ATLAS and CMS experiments
• Heavy Flavour Working Group Summary