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

Barton, Adam Edward and Beattie, Michael and Bertram, Iain Alexander and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Dearnaley, William and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Muenstermann, Daniel Matthias Alfred and Parker, Adam Jackson and Skinner, Malcolm and Smizanska, Maria and Walder, James William and Wharton, Andy (2018) Measurement of the W-boson mass in pp collisions at √s=7 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 78 (2). ISSN 1434-6044

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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 7.8×10 6 candidates in the W→μν channel and 5.9×10 6 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±7 (stat.)±11(exp. syst.) ±14 (mod. syst.) MeV =80370±19 MeV, 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: Journal Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Additional Information: EPJC is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 124135
Deposited By: ep_importer_pure
Deposited On: 20 Mar 2018 16:20
Refereed?: Yes
Published?: Published
Last Modified: 28 Feb 2020 03:30
URI: https://eprints.lancs.ac.uk/id/eprint/124135

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