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

, The ATLAS collaboration (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:
ID Code:
124135
Deposited By:
Deposited On:
20 Mar 2018 16:20
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Nov 2020 06:07