# Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

3-9 November 2019
Wanda Reign Wuhan Hotel
Asia/Shanghai timezone

## Study of ${\rm W}^{\pm}$--boson production in p--Pb and Pb--Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV with ALICE at the LHC

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

#### Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Electromagnetic probes

### Speaker

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

### Description

${\rm W}^{\pm}$ bosons are created in hard scattering processes at the initial stage of heavy-ion collisions and they are insensitive to the presence of the strongly-interacting medium. This makes them clean probes of the initial-state effects in heavy-ion collisions, such as the nuclear modification of the Parton Distribution Functions (nPDFs). Furthermore, their measurement in heavy-ion collisions is a powerful test of the binary scaling of hard processes as well as a reference for hot-matter effects on other probes.

In this contribution, focus will be given to the ${\rm W}^{\pm}$ production cross-section measurement in p‚ÄìPb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV. In addtion the status of the ongoing ${\rm W}^{\pm}$ analyses in Pb‚ÄìPb collisions at the same center of mass energy will be discussed.

### Primary authors

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