Enhancement of the photon emission rate near the QCD critical point
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.
Fields of Study & Subjects
High-Energy Particle Collisions Research
Quantum Chromodynamics and Particle Interactions
Particle Detector Development and Performance
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Volume
- 113
- Issue
- 3
- Publication date
- 7 January 2026
- Language
- EN