Estimations of thermal (virtual & real) radiation

• Thermal dileptons (QGP+HG):

• R. Papp [PRC63, 054907, 2001]

• Expanding thermal fireball model:

• T0 = 370 MeV (t0 ~ 0.6 fm/c)

• Dt = 20 fm/c (Tfreeze-out = 130 MeV)

• D,Dbar from primordial ccbar pairs could be as

• ~ 10x[thermal rad.] @ Minv = 2 GeV (not shown)

• Direct photons (QGP+HG):

• J. Alam [PRC63, 021901, 2001]

• (3+1) D hydro :

• T0 = 300 MeV (t0 ~ 0.5 fm/c)

• 1st order phase trans., Tfreeze-out = 120 MeV

• QGP: Compton,annih., brems., annih.+scatt.

• HG: