# Results on heavy ion physics at LHCb

## TL;DR

LHCb has contributed significantly to heavy ion physics by studying particle production in various collision types at forward rapidity, offering unique insights and complementary data to other experiments, including fixed-target and cosmic ray relevant measurements.

## Contribution

This paper presents an overview of LHCb's recent measurements in heavy ion collisions, highlighting its unique forward-geometry advantages and fixed-target studies at unexplored energies.

## Key findings

- Heavy flavour production studied in p-p, p-Pb, and Pb-Pb collisions.
- Fixed-target collisions at sqrt(sNN) ~ 100 GeV provide new insights.
- Complementary measurements to other LHC experiments.

## Abstract

In the last years, the \lhcb experiment established itself as an important contributor to heavy ion physics by exploiting some of its specific features. Production of particles, notably heavy flavour states, can be studied in p-p, p-Pb and Pb-Pb collisions at LHC energies in the forward rapidity region (pseudorapidity between 2 and 5), providing measurements which are highly complementary to the other LHC experiments. Moreover, owing to its forward geometry, the detector is also well suited to study fixed-target collisions, obtained by impinging the LHC beams on gas targets with different mass numbers. In this configuration, p-A collisions can be studied at the relatively unexplored scale of sqrt(sNN) ~ 100 GeV, also providing valuable inputs to cosmic ray physics. An overview of the measurements obtained so far by the LHCb ion program is presented.