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- Title
Measurement of the <italic>W</italic>-boson mass in pp collisions at s=7TeV with the ATLAS detector.
- Authors
Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Abeloos, B.; Abidi, S. H.; AbouZeid, O. S.; Abraham, N. L.; Abramowicz, H.; Abreu, H.; Abreu, R.; Abulaiti, Y.; Acharya, B. S.; Adachi, S.; ATLAS Collaboration
- Abstract
A measurement of the mass of the <italic>W</italic> 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 4.6fb-1<inline-graphic></inline-graphic> of integrated luminosity. The selected data sample consists of 7.8×106<inline-graphic></inline-graphic> candidates in the W→μν<inline-graphic></inline-graphic> channel and 5.9×106<inline-graphic></inline-graphic> candidates in the W→eν<inline-graphic></inline-graphic> channel. The <italic>W</italic>-boson mass is obtained from template fits to the reconstructed distributions of the charged lepton transverse momentum and of the <italic>W</italic> boson transverse mass in the electron and muon decay channels, yielding mW=80370±7(stat.)±11(exp. syst.)±14(mod. syst.)MeV=80370±19MeV,<graphic></graphic>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+<inline-graphic></inline-graphic> and W-<inline-graphic></inline-graphic> bosons yields mW+-mW-=-29±28<inline-graphic></inline-graphic> MeV.
- Subjects
W bosons; COLLISIONS (Physics); SPECIAL relativity (Physics); LUMINOSITY; MUON decay
- Publication
European Physical Journal C -- Particles & Fields, 2018, Vol 78, Issue 2, p0
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-017-5475-4