Measurement of the top quark mass using single top quark events in proton-proton collisions at sqrt(s) = 8 TeV

Abstract

A measurement of the top quark mass is reported in events containing a single top quark produced via the electroweak t channel. The analysis is performed using data from proton-proton collisions collected with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 inverse femtobarns. Top quark candidates are reconstructed from their decay to a W boson and a b quark, with the W boson decaying leptonically to a muon and a neutrino. The final state signature and kinematic properties of single top quark events in the t channel are used to enhance the purity of the sample, suppressing the contribution from top quark pair production. A fit to the invariant mass distribution of reconstructed top quark candidates yields a value of the top quark mass of 172.95 +/- 0.77 (stat) +0.97/-0.93 (syst) GeV. This result is in agreement with the current world average, and represents the first measurement of the top quark mass in event topologies not dominated by top quark pair production, therefore contributing to future averages with partially uncorrelated systematic uncertainties and a largely uncorrelated statistical uncertainty.

Replaced with the published version. Added the journal reference and DOI. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-15-001

References in corpus (15)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Parton distributions for the LHC
• New parton distributions for collider physics
• Implications of CTEQ global analysis for collider observables
• Pileup subtraction using jet areas
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• The PDF4LHC Working Group Interim Recommendations
• HATHOR for single top-quark production: Updated predictions and uncertainty estimates for single top-quark production in hadronic collisions
• The PDF4LHC Working Group Interim Report
• Next-to-leading-order predictions for t-channel single-top production at hadron colliders
• Measurement of the top quark mass using proton-proton data at sqrt(s) = 7 and 8 TeV
• Pileup subtraction for jet shapes
• Effects of color reconnection on $t\bar{t}$ final states at the LHC
• A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole

Cited by in corpus (15)

• The Large Hadron-Electron Collider at the HL-LHC
• Global analysis of electroweak data in the Standard Model
• What is the Top Quark Mass?
• Single top-quark production at the Tevatron and the LHC
• Measurement of the top quark mass using events with a single reconstructed top quark in pp collisions at $\sqrt{s}$ = 13 TeV
• CMS PYTHIA 8 colour reconnection tunes based on underlying-event data
• Combination of measurements of the top quark mass from data collected by the ATLAS and CMS experiments at $\sqrt{s}$ = 7 and 8 TeV
• Non-factorisable contribution to $t$-channel single-top production
• Constraining the top-quark mass within the global MSHT PDF fit
• MINLO t-channel single-top plus jet
• Review of top quark mass measurements in CMS
• Modeling of $t$-channel single top-quark production at the LHC
• Differential distributions for Single Top Quark Production at the LHeC
• Precise determination of the top-quark on-shell mass $M_t$ via its scale-invariant perturbative relation to the top-quark $\overline{\mathrm{MS}}$ mass ${\overline{m}}_t({\overline{m}}_t)$
• Reduction of planar double-box diagram for single-top production via auxiliary mass flow