Jan 10 – 15, 2021
Weizmann Institute of Science
Asia/Jerusalem timezone
See you at IS2023 in Copenhagen in June 2023

Photon emission in initial and hydrodynamic stages of nuclear collisions

Jan 10, 2021, 7:45 PM
1h 30m
Patio (vDLCC)



bullet talk (poster) Collective dynamics from small to large systems Poster


Akihiko Monnai (Japan Women's University)


Direct photons are a powerful tool to study the properties of QCD matter in nuclear collisions. We investigate the contribution of pre-equilibrium photons before hydrodynamization in addition to those of conventional prompt and thermal photons to obtain a comprehensive picture of direct photon emission in the hybrid model based on relativistic hydrodynamics [1]. Numerical simulations at an LHC energy suggest that the pre-equilibrium photons can be important at intermediate transverse momentum near the saturation momentum scale, increasing particle spectra and reducing elliptic flow of direct photons.

[1] A. Monnai, J. Phys. G: Nucl. Part. Phys 47, 075105 (2020)

Primary author

Akihiko Monnai (Japan Women's University)

Presentation materials