Measurement of the W-boson mass in pp collisions at s√=7TeV with the ATLAS detector



Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2832 more authors) (2018) Measurement of the W-boson mass in pp collisions at s√=7TeV with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 78 (2).

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Abstract

A measurement of the mass of the W boson is presented based on proton–proton collision data recorded in 2011 at a centre-of-mass energy of 7 TeV with the ATLAS detector at the LHC, and corresponding to 4.6 fb−1 of integrated luminosity. The selected data sample consists of 7.8×106 candidates in the W→μν channel and 5.9×106 candidates in the W→eν channel. The W-boson mass is obtained from template fits to the reconstructed distributions of the charged lepton transverse momentum and of the W boson transverse mass in the electron and muon decay channels, yielding mW=80370=80370±7 (stat.)±11(exp. syst.)±14 (mod. syst.) MeV±19MeV, where the first uncertainty is statistical, the second corresponds to the experimental systematic uncertainty, and the third to the physics-modelling systematic uncertainty. A measurement of the mass difference between the W+ and W− bosons yields mW+−mW−=−29±28 MeV.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 12 Feb 2018 10:22
Last Modified: 31 Jul 2021 08:59
DOI: 10.1140/epjc/s10052-017-5475-4
Open Access URL: https://doi.org/10.1140/epjc/s10052-017-5475-4
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3017798