Authors

David Hedin

Document Type

Article

Abstract

We present a measurement of the top-quark mass (mt) in pp- collisions at √s=1.96TeV using tt- events with two leptons (ee, e μ, or μμ) and accompanying jets in 4.3 fb-1 of data collected with the D0 detector at the Fermilab Tevatron collider. We analyze the kinematically underconstrained dilepton events by integrating over their neutrino rapidity distributions. We reduce the dominant systematic uncertainties from the calibration of jet energy using a correction obtained from tt- events with a final state of a single lepton plus jets. We also correct jets in simulated events to replicate the quark flavor dependence of the jet response in data. We measure mt = 173.7 ± 2.8(stat) ±1.5(syst) GeV and combining with our analysis in 1 fb-1 of preceding data we measure mt = 174.0 ± 2.4(stat) ±1.4 (syst) GeV. Taking into account statistical and systematic correlations, a combination with the D0 matrix element result from both data sets yields mt = 173.9 ± 1.9(stat) ± 1.6(syst) GeV.

DOI

10.1103/PhysRevD.86.051103

Publication Date

9-1-2012

Comments

D0 Collaboration

Original Citation

Measurement ofthe top-quark mass in pp- collisions using events with two leptons. V.M. Abazov et al. [D0 Collaboration]. PhysRevD 86. 051103 (2012)

Legacy Department

Department of Physics

Sponsorship

We thank the staffs at Fermilab and collaborating institutions and acknowledge support from the DOE and NSF (USA); CEA and CNRS/IN2P3 (France); FASI, Rosatom and RFBR (Russia); CNPq, FAPERJ, FAPESP and FUNDUNESP (Brazil); DAE and DST (India); Colciencias (Colombia); CONACyT (Mexico); NRF (Korea); CONICET and UBACyT (Argentina); FOM (Netherlands); STFC and the Royal Society (United Kingdom); MSMT and GACR (Czech Republic); BMBF and DFG (Germany); SFI (Ireland); The Swedish Research Council (Sweden); and CAS and CNSF (China).

ISSN

1550-7998

Language

eng

Publisher

American Physical Society

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