Direct Photons from Hot Quark Matter in Renormalized Finite-Time-Path QED

Direct Photons from Hot Quark Matter in Renormalized Finite-Time-Path QED

Within the finite-time-path out-of-equilibrium quantum field theory (QFT), we calculate direct photon emission from early stages of heavy ion collisions, from a narrow window, in which uncertainty relations are still important and they provide a new mechanism for production of photons. The basic dif...

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Bibliographic Details
Published in:Particles Vol. 3; no. 4; pp. 676 - 692
Main Authors: Dadić, Ivan, Klabučar, Dubravko, Kuić, Domagoj
Format: Journal Article
Language:English
Published: MDPI AG 01-12-2020
Subjects:
dimensional renormalization
direct photons
finite-time-path formalism
out-of-equilibrium quantum field theory
Online Access:Get full text
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Summary:Within the finite-time-path out-of-equilibrium quantum field theory (QFT), we calculate direct photon emission from early stages of heavy ion collisions, from a narrow window, in which uncertainty relations are still important and they provide a new mechanism for production of photons. The basic difference with respect to earlier calculations, leading to diverging results, is that we use renormalized QED of quarks and photons. Our result is a finite contribution that is consistent with uncertainty relations.
ISSN:2571-712X
2571-712X
DOI:10.3390/particles3040044