The LPM effect in a partonic transport approach
2019 January 11
Several analytic calculations of radiative jet energy loss demonstrated the importance of the non Abelian Landau-Pomeranchuk-Migdal (LPM) effect, a coherence effect resulting from the finite formation time of emitted gluons. While in these calculations it is possible to calculate gluon emissions including the LPM effect by rigorously resumming diagrams to any order in the opacity, it is still not straightforward to consider such coherence effects in dynamical transport simulations. Therefore we revisit in this proceeding the implementation of the LPM effect in the partonic transport approach BAMPS. By using Debye screened leading-order pQCD matrix elements for the elastic and an improved Gunion-Bertsch approximation for the inelastic processes, BAMPS simulates both the jet and medium evolution in ultra-relativistic heavy-ion collisions. We present a comparison between an effective modeling of the LPM effect via a theta function in the radiative matrix elements and a stochastic Ansatz for the suppression of gluon radiations. Finally, we discuss possible consequences of both methods for jet quenching observables.