Heavy-ion collisions at the Large Hadron Collider: a review of the results from Run 1

TL;DR

This review summarizes key experimental findings from Run 1 of the LHC on heavy-ion collisions, covering global properties, hard probes, and electromagnetic signals, highlighting the state of knowledge in quark-gluon plasma research.

Contribution

It provides a comprehensive overview of experimental results from Run 1, integrating diverse measurements and briefly discussing theoretical interpretations.

Findings

Observation of azimuthal asymmetries and correlations at low transverse momentum.

Measurement of high transverse momentum particles, jets, and heavy quark production.

Detection of electromagnetic signals like photons and dileptons in heavy-ion collisions.

Abstract

We present an overview of the results obtained in pPb and PbPb collisions at the Large Hadron Collider during Run 1. We first discuss the results for global characteristics: cross sections, hadron multiplicities, azimuthal asymmetries, correlations at low transverse momentum, hadrochemistry, and femtoscopy. We then review hard and electromagnetic probes: particles with high transverse momentum, jets, heavy quarks, quarkonium, electroweak bosons and high transverse momentum photons, low transverse momentum photons and dileptons, and ultraperipheral collisions. We mainly focus on the experimental results, and present very briefly the main current theoretical explanations.