The first dedicated Z-boson mass measurement at the LHC with Z->mu+mu- decays is reported. The dataset uses proton-proton collisions at a center-of-mass energy of 13 TeV, recorded in 2016 by the LHCb experiment, and corresponds to an integrated luminosity of 1.7 fb-1. A template fit to the mu+mu- mass distribution yields the following result for the Z-boson mass: mZ=91,185.7\pm 8.3 \pm 3.9 MeV, where the first uncertainty is statistical and the second systematic. This result is consistent with previous measurements and predictions from global electroweak fits.
Measurement of the Z-Boson Mass
Kleijne N.Membro del Collaboration Group
;Morello M. J.Membro del Collaboration Group
;Passaro D.Membro del Collaboration Group
;Riccardi D.Membro del Collaboration Group
;Xu A.Membro del Collaboration Group
;
2025
Abstract
The first dedicated Z-boson mass measurement at the LHC with Z->mu+mu- decays is reported. The dataset uses proton-proton collisions at a center-of-mass energy of 13 TeV, recorded in 2016 by the LHCb experiment, and corresponds to an integrated luminosity of 1.7 fb-1. A template fit to the mu+mu- mass distribution yields the following result for the Z-boson mass: mZ=91,185.7\pm 8.3 \pm 3.9 MeV, where the first uncertainty is statistical and the second systematic. This result is consistent with previous measurements and predictions from global electroweak fits.File in questo prodotto:
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