# ICHEP 2020

28 July 2020 to 6 August 2020
virtual conference
Europe/Prague timezone

## Measurement of electroweak-boson production in p-Pb and Pb-Pb collisions with ALICE at the LHC

28 Jul 2020, 15:30
24m
virtual conference

#### virtual conference

Talk 07. Heavy Ions

### Speaker

Mingrui Zhao (China Institute of Atomic Energy (CN))

### Description

W and Z bosons are clean probes of the initial-state effects in hadronic collisions, being formed in the hard scatterings taking place in the initial stages, and being insensitive to the presence of any strongly-interacting medium. This is especially true at the LHC energies, where having a clear picture of the initial state is mandatory to properly interpret the later stages characterising the complex evolution of p-Pb and Pb-Pb collisions. In particular, measurement of W and Z boson production in p-Pb and Pb-Pb collisions at the LHC provides constraints on the nPDFs of the (anti-)quarks in a phase-space region that is poorly constrained by previous experiments.

ALICE measures W and Z boson production in the muonic decay channels at forward rapidities ($2.5 < y_\mathrm{lab} < ~4$). In this contribution, recent measurements on the Z and W boson production in p-Pb and Pb-Pb collisions at the center-of-mass energies per nucleon pair of $\sqrt{s_\mathrm{NN}} = 8.16$ and 5.02 TeV, respectively, are presented. Results, including invariant production yield and nuclear modification factors as a function of rapidity and collision centrality, are compared to calculations obtained with or without including nuclear modifications of the PDFs, as well as to results obtained by other LHC experiments.

 Secondary track (number) 06

### Primary author

Mingrui Zhao (China Institute of Atomic Energy (CN))