Measurement of the top quark mass in the tt→dilepton channel from √s=8TeV ATLAS data. / The ATLAS Collaboration.

In: Physics Letters B, Vol. 761, 10.10.2016, p. 350–371.

Research output: Contribution to journalArticle

Published
  • The ATLAS Collaboration

Abstract

The top quark mass is measured in the tt→dilepton channel (lepton=e,μ) using ATLAS data recorded in the year 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of √s=8TeV and correspond to an integrated luminosity of about 20.2 fb−1. Exploiting the template method, and using the distribution of invariant masses of lepton–b-jet pairs, the top quark mass is measured to be m top=172.99 ±0.41 (stat) ± 0.74 (syst) GeV , with a total uncertainty of 0.84 GeV. Finally, a combination with previous ATLAS mtop measurements from √s=& TeVdata in the tt→dilepton and tt→dilepton + jets channels results in mtop=172.84±0.34 (stat)±0.61 (syst) GeV, with a total uncertainty of 0.70 GeV.
Original languageEnglish
Pages (from-to)350–371
Number of pages22
JournalPhysics Letters B
Volume761
Early online date24 Aug 2016
DOIs
Publication statusPublished - 10 Oct 2016
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

ID: 26942790