Enhancement of the photon emission rate near the QCD critical point

Authors:
Open Access
Publisher website
Google Scholar
Abstract
We compute photon emission rate enhancement near the QCD critical point using an effective theory of dynamic critical phenomena and derive a universal photon spectrum. The emission rate scales similar to conductivity, increasing with the correlation length ( ξ ), diverging at the critical point. The spectrum exhibits ω d N γ / d 3 k ∝ ω − 1 / 2 in the scaling regime, with the transition occurring at a frequency comparable to shear damping rate ω ∼ γ η / ξ 2 , reflecting the nonequilibrium properties of the near-critical liquid.
Funding Information
  • Japan Society for the Promotion of Science (JP23H01174)
  • Japan Society for the Promotion of Science (JP23K25870)
  • Japan Society for the Promotion of Science (22K20369)
  • Japan Society for the Promotion of Science (25K07316)
  • Japan Society for the Promotion of Science (JP23K03386)
  • RIKEN
  • U.S. Department of Energy
  • Office of Science
  • Nuclear Physics (DEFG0201ER41195)

This publication has 42 references indexed in Scilit: