Recent bottomonium measurements in pp, p--Pb and Pb--Pb collisions at forward rapidity with ALICE at the LHC

TL;DR

This paper presents recent measurements of bottomonium production in pp, p--Pb, and Pb--Pb collisions at the LHC, providing insights into quark-gluon plasma properties and cold nuclear matter effects.

Contribution

It reports new experimental data on bottomonium nuclear modification factors and azimuthal anisotropies at forward rapidity with the ALICE detector.

Findings

Observation of bottomonium suppression in Pb--Pb collisions

Measurement of azimuthal anisotropy of bottomonium states

Comparison of bottomonium production across different collision systems

Abstract

In ultrarelativistic nucleus-nucleus collisions, a deconfined state of strongly interacting matter is thought to be produced, commonly known as the quark--gluon plasma (QGP). Quarkonia, bound states of a heavy quark and antiquark, are an important probe to study the properties of the QGP. At the LHC, bottomonium (b$\rm\overline{b}$) is of particular interest to study the QGP complementarily to the lighter charmonium (c$\rm\overline{c}$) system. In addition to the measurements in nucleus-nucleus collisions, reference measurements in proton-proton and proton-nucleus collisions have been also carried out in order to better understand the bottom quark production and cold nuclear matter effects. ALICE measures the bottomonium production in the dimuon decay channel at forward rapidity ($2.5<y_{\rm {lab}}<4.0$) with the muon spectrometer. In this contribution, the recent measurements of bottomonium nuclear modification factors and azimuthal anisotropies in Pb--Pb collisions are presented. The bottomonium production in p--Pb and pp collisions are also discussed.