Lattice calculation of dilepton production in peripheral relativistic heavy-ion collisions

摘要

In this talk, I will concentrate on electromagnetic dilepton production in peripheral heavy-ion collisions at relativistic energies. For very heavy systems such as Au + Au, U+U the effective coupling constant Zalpha approx approx 0.5, thus casting doubt on the applicability of perturbation theory. We shall therefore ultilize a nonperturbative lattice approach. The main problem to be solved is the Dirac equation for leptons in the presence of strong transient EM fields (E_max=10~25V/m for U+U at RHIC energies).