Measurement of the top quark mass in the tt ¯ → lepton+jets channel from √ s=8 TeV ATLAS data and combination with previous results

Abraham, N L, Allbrooke, B M M, Asquith, L, Cerri, A, Jones, S D, De Santo, A, Salvatore, F, Shaw, K, Stevenson, T J, Suruliz, K, Sutton, M R, Tresoldi, F, Trovato, F, Vivarelli, I, Winkels, E, The ATLAS Collaboration, and others, (2019) Measurement of the top quark mass in the tt ¯ → lepton+jets channel from √ s=8 TeV ATLAS data and combination with previous results. European Physical Journal C: Particles and Fields, 79 (4). a290 1-51. ISSN 1434-6044

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (3MB)

Abstract

The top quark mass is measured using a template method in the t ¯t → lepton + jets channel (lepton is e or μ) using ATLAS data recorded in 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 20.2 fb−1. The t ¯t → lepton + jets channel is characterized by the presence of a charged lepton, a neutrino and four jets, two of which originate from bottom quarks (b). Exploiting a three-dimensional template technique, the top quark mass is determined together with a global jet energy scale factor and a relative b-to-light-jet energy scale factor. The mass of the top quark is measured to be m top = 172.08 ± 0.39 (stat) ± 0.82 (syst) GeV. A combination with previous ATLAS m top measurements gives m top = 172.69 ± 0.25 (stat) ± 0.41 (syst) GeV.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Amelia Redman
Date Deposited: 24 Sep 2019 10:55
Last Modified: 24 Sep 2019 11:00
URI: http://sro.sussex.ac.uk/id/eprint/85926

View download statistics for this item

📧 Request an update