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

Aaboud, M; Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; Abidi, SH; ... Zwalinski, L; + view all (2018) Measurement of the W-boson mass in pp collisions at root s=7 TeV with the ATLAS detector. The European Physical Journal C , 78 (2) , Article 110. 10.1140/epjc/s10052-017-5475-4. Green open access

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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−14.6 fb−1 of integrated luminosity. The selected data sample consists of 7.8×1067.8×106 candidates in the W→μνW→μν channel and 5.9×1065.9×106 candidates in the W→eνW→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, mW=80370±7 (stat.)±11(exp. syst.)±14 (mod. syst.) MeV=80370±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+W+ and W−W− bosons yields mW+−mW−=−29±28mW+−mW−=−29±28 MeV.

Type: Article
Title: Measurement of the W-boson mass in pp collisions at root s=7 TeV with the ATLAS detector
Open access status: An open access version is available from UCL Discovery
DOI: 10.1140/epjc/s10052-017-5475-4
Publisher version: http://doi.org/10.1140/epjc/s10052-017-5475-4
Language: English
Additional information: Copyright information © CERN for the benefit of the ATLAS collaboration 2018 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/1540616
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