Measurement of the W-boson mass in pp collisions at s√=7TeV with the ATLAS detector
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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=80370±7 (stat.)±11(exp. syst.)±14 (mod. syst.) MeV±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.
CitationAaboud M, Aad G, Abbott B, Abdallah J, Abdinov OBo, Abeloos B, Abidi SH, AbouZeid H, Abraham NL, Abramowicz H, Buanes T, Dale Ø, Eigen G, Liebig W, Lipniacka A, Martin dit Latour B, Mæland S, Smestad L, Stugu B, Yang Z, Zalieckas J, Bugge MK, Cameron DG, Catmore JR, Feigl S, Franconi L, Garonne V, Gjelsten BK, Gramstad E, Morisbak V, Nilsen JK, Ould-Saada F, Raddum SH, Read AL, Røhne OM, Sandaker H, Serfon C, Stapnes S, Strandlie A, Abreu RF, Abulaiti Y, Acharya BS, Adachi S, Adamczyk L, Adams D, Adelman J, Adersberger M, Adye T, Affolder AA, Agatonovic-Jovin T, ATLAS C. Measurement of the W-boson mass in pp collisions at s√=7TeV with the ATLAS detector. European Physical Journal C. 2018;78:110:1-61
PublisherSpringer Berlin Heidelberg
CERN for the benefit of the ATLAS collaboration 2018