Conveners
Open and New (Electromagnetic): Parallel 1
- Gabor David (Brookhaven National Laboratory)
Dileptons and photons are unique tools to study the space–time evolution of the hot and dense matter created in ultra-relativistic heavy-ion collisions. They are produced continuously by a variety of processes, in particular prompt and thermal photons and semi-leptonic heavy-flavour hadron decays, during the entire history of the collision and traverse the medium...
Recently, significant enhancements of $e^{+}e^{−}$ pairs at very low transverse momentum ($p_{\rm{T}}$) were observed by the STAR collaboration in peripheral Au+Au collisions. The excess can be explained by photon-photon interactions induced by the extremely strong electromagnetic field produced by the fast moving heavy ions. While such photon-photon interactions were traditionally studied in...
Quarks and antiquarks carry electric charges and can interact in
quantum electrodynamcal (QED) interactions. There appear no laws that
forbid quarks and antiquarks to interact in QED interactions alone.
Permitted on the basis of Gell-Mann's Totalitarian Principle that what
is not forbidden is allowed and motivated by observations of low-mass
anomalous particles in [1,2,3], we study the...
We study the in-medium effects in strangeness production
in heavy-ion collisions at (sub-)-threshold energies of 1 - 2 A GeV based on
the microscopic Parton-Hadron-String Dynamics (PHSD) transport approach.
The in-medium modifications of the antikaon $(\bar K = K^-, \bar K^0)$ properties
are described via the self-consistent coupled-channel unitarized scheme
based on a SU(3) chiral...
Based on the fact that the mass difference between the chiral partners is an
order parameter of chiral phase transition and that the chiral order parameter
reduces substantially at the chemical freeze-out point in ultra-relativistic
heavy ion collisions, we argue that the production ratio of $K_1$ over $K^*$ in
such collisions should be substantially larger than that predicted in...
