Hadronic production of thermal photons

By S. Turbide, R. Rapp, C. University, Nordita. 2003

244 citations recorded by the source corpus.

We study the thermal emission of photons from hot and dense strongly interacting hadronic matter at temperatures close to the expected phase transition to the quark-gluon plasma (QGP). Earlier calculations of photon radiation from ensembles of interacting mesons are reexamined with additional constraints, including new production channels as well as an assessment of hadronic form factor effects. Whereas strangeness-induced photon yields turn out to be moderate, the hitherto not considered $t$-channel exchange of $\ensuremath{\omega}$ mesons is found to contribute appreciably for photon energies above $\ensuremath{\sim}1.5\phantom{\rule{0.3em}{0ex}}\text{GeV}$. The role of baryonic effects is assessed using existing many-body calculations of lepton pair production. We argue that our combined results constitute a rather realistic emission rate, appropriate for applications in relativistic heavy-ion collisions. Supplemented with recent evaluations of QGP emission, and an estimate for primordial (hard) production, we compute photon spectra at Super Proton Synchrotron (SPS), Relativistic Heavy Ion Collider (RHIC), and Large Hadron Collider (LHC) energies.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/1d212204259d0cd54577deb1825c1d71fc04c859

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Collective Phenomena in the Non-Equilibrium Quark-Gluon Plasma (2008, background): “The same values as used in [93] and [14] to allow for a comparison.”
Direct photon production in Pb-Pb collisions at $\sqrt{s_\rm{NN}}$ = 2.76 TeV (2015, methodology): “The photon production rates in the hadronic phase are based on a massive Yang–Mills description of gas of π , K , ρ , K ∗ , and a1 mesons, along with additional production channels (including anti-/baryons) evaluated with the inmedium ρ spectral function [19].”
Formation of dense partonic matter in relativistic nucleus–nucleus collisions at RHIC: Experimental evaluation by the PHENIX Collaboration (2004, background): “There is no conclusive evidence for QGP thermal photons from the CERN experiments (for a recent review see [244]).”