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

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journal contribution
posted on 2023-06-09, 18:55 authored by N L Abraham, Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, Samuel Jones, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, Kate ShawKate Shaw, Thomas StevensonThomas Stevenson, K Suruliz, Mark SuttonMark Sutton, F Tresoldi, Fabrizio Trovato, Iacopo Vivarelli, E Winkels, The ATLAS Collaboration, others
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 vs = 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.

History

Publication status

  • Published

File Version

  • Published version

Journal

European Physical Journal C: Particles and Fields

ISSN

1434-6044

Publisher

Springer Verlag

Issue

4

Volume

79

Page range

1-51

Article number

a290

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-09-24

First Open Access (FOA) Date

2019-09-24

First Compliant Deposit (FCD) Date

2019-09-03

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