Conveners
Parallel Session I: EM Probes (I)
- Daimei Zhou (IOPP)
Direct photons are produced at every stage of the nucleus-nucleus collision and therefore they are sensitive to the different phases of the medium evolution. The low-$p_T$ component of the direct photon spectrum is dominated by thermal production in the quark-gluon plasma and during the hadron-gas phase and carries information about the temperature of the emitting medium; for $p_T$ greater...
The PHENIX experiment discovered a large excess of low-pT direct
photons in Au+Au collisions at 200 GeV compared to reference p+p
collisions, which has been attributed to thermal radiation from the
medium produced in the collisions. At the same time the excess photons
show a large azimuthal anisotropy, expressed as Fourier coefficients
v2 and v3. These surprising results have not
yet been...
We present a systematic study of electromagnetic radiation and of the hadronic observables in (p, d, $^3$He)+Au collisions at RHIC energies and in p+Pb collisions at the LHC energy. Using a (3+1)-d viscous hydrodynamics + hadronic cascade hybrid framework, the effects of breaking the longitudinal boost-invariance on direct photon and hadronic observables are quantified. Predictions of thermal...
Bulk viscosity has recently been shown to play a major role in describing both photon [1] and hadron [2] observables at the Relativistic Heavy-Ion Cllider (RHIC) and the Large Hadron Collider (LHC). Thermal dilepton production is a particularly interesting electromagnetic probe that, up until now, has not been studied within such simulations. Using the differential nature of the dilepton...
