Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenology of collinear photon emission from quark-gluon plasma in
  $AA$ collisions   We study the role of running coupling and the effect of variation of the
thermal quark mass on contribution of the collinear bremsstrahlung and
annihilation to photon emission in $AA$ collisions in a scheme similar to that
used in our previous jet quenching analyses. We find that for a scenario with
the thermal quark mass $m_q\sim 50-100$ MeV contribution of the higher order
collinear processes summed with the $2\to 2$ processes can explain a
considerable part ($\sim 50$\%) of the experimental photon spectrum at $k_T\sim
2-3$ GeV for Au+Au collisions at $\sqrt{s}=0.2$ TeV. But for $m_q=300$ MeV and
for the thermal quark mass predicted by the HTL scheme the theoretical
predictions underestimate considerably the experimental spectrum.

9
The categories of this paper are: nlin
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph