Speaker
剑桥 邓
(CERN)
Description
The first dedicated Z-boson mass measurement at the LHC with Z→μ+μ− decays is reported. The dataset uses proton-proton collisions at a centre-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 μ+μ− mass distribution yields the following result for the Z-boson mass,
mZ = 91184.2 ± 8.5 ± 3.8MeV,
where the first uncertainty is statistical and the second systematic. This result is consistent with previous measurements and predictions from global electroweak fits.
Primary authors
LHCb collaboration
剑桥 邓
(CERN)
