2026/02/26 by ALICE Collaboration · 1 voice
#hep-ex #nucl-ex
Measurements of the production of the W± and Z0 bosons at midrapidity in pp collisions at √(s) = 13 TeV with ALICE at the Large Hadron Collider (LHC) are presented. The W± and Z0 bosons are detected via their (di)electronic decay channels, with the electron reconstruction performed in the midrapidity region (|y|< 0.6). The p\rm T-integrated and p\rm T-differential production cross sections of electrons from W± decays in the interval 30 < p\rm T < 60 GeV/c, as well as the p\rm T-integrated production cross section of Z0 bosons, are measured. The results are described by perturbative QCD calculations using different sets of parton distribution functions. The production of W± bosons and azimuthally correlated associated hadrons is also measured as a function of the charged-particle multiplicity for the first time at the LHC. The former increases approximately linearly with the charged-particle multiplicity, while for the latter, there are hints of a faster-than-linear increase. These observations are compared with theoretical calculations.