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Measurement of the top quark mass in the tt? ? Dileptonchannel from ?s=8 TeV ATLAS data
Journal article   Peer reviewed

Measurement of the top quark mass in the tt? ? Dileptonchannel from ?s=8 TeV ATLAS data

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, O. Abdinov, B. Abeloos, R. Aben, O.S. AbouZeid, N.L. Abraham, H. Abramowicz, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol.761, pp.350-371
2016

Abstract

The top quark mass is measured in the tt̄ → dileptonchannel (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=8 TeV and correspond to an integrated luminosity of about 20.2fb -1 . Exploiting the template method, and using the distribution of invariant masses of lepton-b-jetpairs, 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, acombination with previous ATLAS m top measurements from √s=7TeVdata in the tt̄ → dilepton and tt̄→lepton+jetschannels results in m top =172.84 ±0.34 (stat) ±0.61 (syst) GeV, with a total uncertainty of 0.70 GeV.
url
https://doi.org/10.1016/j.physletb.2016.08.042View
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