Speaker
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–Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV. In addtion the status of the ongoing ${\rm W}^{\pm}$ analyses in Pb–Pb collisions at the same center of mass energy will be discussed.
