Finite lifetime effects on the photon production from a quark-gluon plasma
F. Michler, B. Schenke, C. Greiner
TL;DR
This paper investigates how finite lifetime effects influence photon emission from a quark-gluon plasma using the Keldysh formalism, proposing a method to obtain a UV-finite photon spectrum during QGP evolution.
Contribution
It introduces an ansatz that removes divergences from vacuum polarization, enabling UV-finite photon spectra in finite-lifetime QGP models.
Findings
Finite lifetime effects significantly modify photon emission rates.
The proposed ansatz effectively eliminates UV divergences.
Photon spectra become UV-finite with proper time evolution modeling.
Abstract
We use the real-time Keldysh formalism to investigate finite lifetime effects on the photon emission from a quark-gluon plasma (QGP). We provide an ansatz which eliminates the divergent contribution from the vacuum polarization and renders the photon spectrum UV-finite if the time evolution of the QGP is described in a suitable manner.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Quantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies