Bulk viscosity and energy-momentum correlations in high energy hadron collisions

TL;DR

This paper proposes a method to measure the bulk viscosity of strongly interacting hadron matter in heavy ion collisions through particle-energy/momentum correlations, enabling experimental access at LHC and RHIC.

Contribution

It introduces a novel correlation-based measurement technique for bulk viscosity in high-energy hadron collisions, complementing existing shear viscosity estimates.

Findings

Method enables bulk viscosity measurement in heavy ion collisions.

Applicable to high-multiplicity events at LHC and RHIC.

Provides a new experimental approach to probe hadron matter properties.

Abstract

We show how the measurement of appropriately constructed particle-energy/momentum correlations allows access to the bulk viscosity of strongly interacting hadron matter in heavy ion collisions. This measurement can be performed by the LHC and RHIC experiments in events with high-particle multiplicity, following up on existing estimates of the shear viscosity based on elliptic flow.