Spin Polarized Photons from Axially Charged Plasma at Weak Coupling: Complete Leading Order

Abstract

In the presence of (approximately conserved) axial charge in the QCD plasma at finite temperature, the emitted photons are spin-aligned, which is a unique P- and CP-odd signature of axial charge in the photon emission observables. We compute this "P-odd photon emission rate" in weak coupling regime at high temperature limit to complete leading order in the QCD coupling constant: the leading log as well as the constant under the log. As in the P-even total emission rate in the literature, the computation of P-odd emission rate at leading order consists of three parts: 1) Compton and Pair Annihilation processes with hard momentum exchange, 2) soft t- and u-channel contributions with Hard Thermal Loop re-summation, 3) Landau-Pomeranchuk-Migdal (LPM) re-summation of collinear Bremstrahlung and Pair Annihilation. We present analytical and numerical evaluations of these contributions to our P-odd photon emission rate observable.

41 pages, 11 figures; v2: one minor typo fixed, references added, accepted for publication in PRD

References in corpus (5)

• The Chiral Magnetic Effect
• Charge separation induced by P-odd bubbles in QCD matter
• Chiral Magnetic conductivity
• Photon polarization as a probe for quark-gluon plasma dynamics
• Second Order Transport Coefficient from Chiral Anomaly at Weak Coupling: Diagrammatic Resummation

Cited by in corpus (9)

• Quantum Kinetic Theory of Spin Polarization of Massive Quarks in Perturbative QCD: Leading Log
• Chiral Magnetic Effects in Nuclear Collisions
• Anatomy of chiral magnetic effect in and out of equilibrium
• Photon emission from quark-gluon plasma out of equilibrium
• One-loop Kubo estimations of the shear and bulk viscous coefficients for hot and magnetized Bosonic and Fermionic systems
• Dilepton Helical Production in a Vortical Quark-Gluon Plasma
• Relaxation Times for Chiral Transport Phenomena and Spin Polarization in Strongly Coupled Plasma
• Photon radiation in hot nuclear matter by means of chiral anomalies
• Circularly polarized photon emission from magnetized chiral plasmas