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

ATLAS Collaboration; Paul Newman; Konstantinos Nikolopoulos; David Charlton

doi:10.1140/epjc/s10052-017-5475-4

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

ATLAS Collaboration, Paul Newman, Konstantinos Nikolopoulos, David Charlton

Physics and Astronomy

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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 ±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⁺ and W⁻ bosons yields m_W+−m_W−=−29±28 MeV.

Original language	English
Article number	110
Number of pages	61
Journal	European Physical Journal C
Volume	78
Issue number	2
DOIs	https://doi.org/10.1140/epjc/s10052-017-5475-4
Publication status	Published - 6 Feb 2018

Bibliographical note

86 pages in total, author list starting page 70, 30 figures, 13 tables, submitted to EPJC, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2014-18

Keywords

hep-ex

Access to Document

10.1140/epjc/s10052-017-5475-4Licence: Creative Commons: Attribution (CC BY)

ATLAS_Collaboration_Measurement_of_the_W_boson_mass_in_pp_collisions_European_Physical_Journal_C_2018
Aaboud, M., Aad, G., Abbott, B. et al. Measurement of the W-boson mass in pp collisions at s√=7TeV with the ATLAS detector. Eur. Phys. J. C 78, 110 (2018). https://doi.org/10.1140/epjc/s10052-017-5475-4
Final published version, 3.28 MBLicence: Creative Commons: Attribution (CC BY)

https://doi.org/10.1140/epjc/s10052-017-5475-4Licence: Creative Commons: Attribution (CC BY)

Cite this

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

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, yieldingmW=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+ and W− bosons yields mW+−mW−=−29±28 MeV.",

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AU - ATLAS Collaboration

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AU - Nikolopoulos, Konstantinos

AU - Charlton, David

N1 - 86 pages in total, author list starting page 70, 30 figures, 13 tables, submitted to EPJC, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2014-18

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N2 - 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, yieldingmW=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+ and W− bosons yields mW+−mW−=−29±28 MeV.

AB - 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, yieldingmW=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+ and W− bosons yields mW+−mW−=−29±28 MeV.

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