Precise Measurement of the Top-Quark Mass from lepton + jets Events

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

October 2008

Comments

Published in PRL 101, 182001 (2008). Copyright 2008. Used by permission.

Abstract

We measure the mass of the top quark using top-quark pair candidate events in the lepton + jets channel from data corresponding to 1 fb^-1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron collider. We use a likelihood technique that reduces the jet energy scale uncertainty by combining an in situ jet energy calibration with the independent constraint on the jet energy scale (JES) from the calibration derived using photon þ jets and dijet samples. We find the mass of the top quark to be 171.5 ± 1.8(stat) + JES) ± 1.1(syst) GeV.