Enhancement of photon emission rate near 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 similarly to conductivity, increasing with the correlation length ($\xi$), diverging at the critical point. The spectrum exhibits $\omega d{N}_{\gamma }/d^{3}k\propto {\omega }^{-1/2}$ in the scaling regime, with the transition occurring at a frequency comparable to shear damping rate $\omega \sim {\gamma }_{\eta }/{\xi }^2$, reflecting the nonequilibrium properties of the near-critical liquid.

arXiv comment11 pages, 3figures, version accepted for publication in Phys. Rev. D

References in corpus (25)

• Signatures of the Tricritical Point in QCD
• The phase diagram of dense QCD
• Event-by-Event Fluctuations in Heavy Ion Collisions and the QCD Critical Point
• Non-Gaussian fluctuations near the QCD critical point
• Photon Emission from Quark-Gluon Plasma: Complete Leading Order Results
• Mapping the Phases of Quantum Chromodynamics with Beam Energy Scan
• Slowing Out of Equilibrium Near the QCD Critical Point
• The Kibble-Zurek Problem: Universality and the Scaling Limit
• Hydro+: hydrodynamics with parametric slowing down and fluctuations near the critical point
• Dynamic universality class of the QCD critical point
• Real time evolution of non-Gaussian cumulants in the QCD critical regime
• Diffusive dynamics of critical fluctuations near the QCD critical point
• Universal off-equilibrium scaling of critical cumulants in the QCD phase diagram
• Fluctuation dynamics in a relativistic fluid with a critical point
• Transits of the QCD Critical Point
• Dynamic critical phenomena from spectral functions on the lattice
• Evolution of Non-Gaussian Hydrodynamic Fluctuations
• Spectral functions and critical dynamics of the $O(4)$ model from classical-statistical lattice simulations
• Spectral functions and dynamic critical behavior of relativistic $Z_2$ theories
• Dynamics of the $O(4)$ critical point in QCD
• Simulations of stochastic fluid dynamics near a critical point in the phase diagram
• The stochastic relativistic advection diffusion equation from the Metropolis algorithm
• Dynamics of non-Gaussian fluctuations in model A
• Critical dynamics of relativistic diffusion
• Issues with Search for Critical Point in QCD with Relativistic Heavy Ion Collisions