# Bulk viscous effects on flow and dilepton radiation in a hybrid approach

## TL;DR

This study examines how bulk viscosity influences low mass dilepton production and flow in heavy-ion collisions at RHIC and LHC energies, considering both thermal and cocktail contributions.

## Contribution

It introduces a hybrid approach starting from IP-Glasma initial conditions to analyze bulk viscous effects on dilepton flow, highlighting their measurable impact.

## Key findings

- Bulk viscosity affects thermal dilepton $v_2$.
- The combined thermal and cocktail dilepton $v_2$ shows measurable bulk effects.
- Bulk effects depend on the dilepton cocktail contribution.

## Abstract

Starting from IP-Glasma initial conditions, we investigate the effects of bulk pressure on low mass dilepton production at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) energies. Though thermal dilepton $v_2$ is affected by the presence of both bulk and shear viscosity, whether or not these effects can be measured depends on the dilepton "cocktail" contribution to the the low mass dilepton $v_2$. Combining the thermal and "cocktail" dileptons, the effects of bulk viscosity on total dilepton $v_2$ is investigated.