# Dilepton production and elliptic flow from an anisotropic quark-gluon plasma

## TL;DR

This paper models dilepton production and elliptic flow in quark-gluon plasma from heavy-ion collisions using anisotropic hydrodynamics, analyzing how anisotropy and viscosity affect observable yields and flow patterns.

## Contribution

It introduces a 3+1D anisotropic hydrodynamics framework to calculate dilepton yields and flow, incorporating momentum anisotropy effects in a detailed manner.

## Key findings

- Momentum anisotropy significantly influences dilepton yields.
- Viscosity to entropy ratio impacts elliptic flow patterns.
- Initial momentum anisotropy alters the dilepton production rates.

## Abstract

We calculate the yield and elliptic flow of mid-rapidity dileptons emitted from the quark-gluon plasma generated in Pb-Pb collisions at LHC. We use relativistic anisotropic hydrodynamics for the 3+1 dimensional evolution of the quark-gluon plasma and convolve this with the momentum-anisotropic local rest frame production rate for dileptons. The effects of momentum anisotropy of the quark distribution functions, viscosity to entropy density ratio, centrality of the collisions, and initial momentum anisotropy on the results are investigated and discussed.