Strong and Electromagnetic Forces in Heavy Ion Collisions

Particle production in strong electromagnetic fields in relativistic heavy-ion collisions

Electromagnetic Signals and Backgrounds in Heavy-Ion Collisions

Aspects of the dilepton spectrum in heavy-ion collisions are discussed, with special emphasis on using lattice computations to guide the phenomenology of finite temperature hadronic matter. The background rates for continuum dileptons expected in forthcoming experiments are summarised. Properly augmented by data from ongoing measurements at HERA, these rates will serve as a calibrating backgrou...

Coherent Electromagnetic Processes in Ultra-Peripheral Heavy-Ion Collisions

We report measurements for coherent ρ production, AuAu→AuAuρ, and coherent ρ and ee pair production accompanied by mutual nuclear Coulomb excitation, AuAu→AuAuρ and AuAu → Au∗Au∗ + ee, in ultra-peripheral relativistic gold-gold collisions (UPC). We discuss transverse momentum, mass, and rapidity distributions. The two photon-process of ee pair production is an important probe of strong field QE...

Coherent Electromagnetic Processes in Relativistic Heavy Ion Collisions

Using the strong electromagnetic fields in peripheral heavy ion collisions gives rise to a number of interesting possibilities of applications in both photon-photon and photon-hadron physics. We look at the theoretical foundations of the equivalent photon approximation and the specific problems in the heavy ion case. The interesting physics processes that can be studied in this way are outlined...

Electromagnetic Probes of Dense Matter in Relativistic Heavy-ion Collisions

Dilepton and photon production in heavy-ion collisions at SPS energies is studied in the relativistic transport model that incorporates self-consistently the change of hadron masses in dense matter. It is found that the dilepton spectra in protonnucleus reactions can be well described by the conventional mechanisms of Dalitz decay, primary vector meson decay, decay of charmed mesons, and the in...