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Precise Measurement of the Top-Quark Mass from Lepton+Jets events at DØ
Stockholm University, Faculty of Science, Department of Physics.
2011 (English)In: Physical Review D, ISSN 1550-7998, Vol. 84, no 3, 032004- p.Article in journal (Refereed) Published
Abstract [en]

We report a measurement of the mass of the top quark in lepton + jets final states of p (p) over bar -> t (t) over bar data corresponding to 2.6 fb(-1) of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider. A matrix-element method is developed that combines an in situ jet energy calibration with our standard jet energy scale derived from studies of gamma + jet and dijet events. We then implement a flavor-dependent jet-response correction through a novel approach. This method is used to measure a top-quark mass of m(t) = 176.01 +/- 1.64 GeV. Combining this result with our previous result obtained on an independent data set, we measure a top-quark mass of m(t) = 174.94 +/- 1.49 GeV for a total integrated luminosity of 3.6 fb(-1).

Place, publisher, year, edition, pages
2011. Vol. 84, no 3, 032004- p.
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-63094DOI: 10.1103/PhysRevD.84.032004ISI: 000293703700002OAI: diva2:446681
Swedish Research Council
Publikationen har totalt 421 författare, V. Abazov et al.Available from: 2011-10-08 Created: 2011-10-08 Last updated: 2012-01-26Bibliographically approved

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