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

Measurements of electroweak-bosons in heavy-ion collisions with ALICE are reported. They are measured at large rapidities, via their (di)muonic decay: Z $\to {\mu }^{+}{\mu }^{-}$ and W${}^{\pm }\to {\mu }^{\pm }\nu$. The Z production and nuclear modification factor in Pb–Pb collisions at $\sqrt{s_{{}_{\mathrm{N}\mathrm{N}}}}$ = 5.02 TeV are presented and compared to theoretical predictions with or without nuclear modifications of the Parton Distribution Functions. Measurements of electroweak-boson production in p–Pb collisions at $\sqrt{s_{{}_{\mathrm{N}\mathrm{N}}}}$ = 5.02 and 8.16 TeV are also presented and discussed.