Enhanced dilepton emission from a phase transition in dense matter
Abstract
It is demonstrated that the presence of a phase transition in heavy ion collisions, at beam energies that probe dense QCD matter, leads to a significant enhancement of the dilepton yield per produced pion due to the extended emission time. In addition, the temperature of low mass dileptons shows a modest decrease due to the mixed phase. The emission of dileptons in the SIS18-SIS100 beam energies range is studied by augmenting the UrQMD transport model with a realistic density dependent equation of state, as well as two different phase transitions. This is achieved by extending the molecular dynamics interaction part of the UrQMD model to a density dependent interaction potential with a high density minimum leading to a phase transition and metastable coexisting high density states. Together with a high precision measurement these simulations will be able to constrain the existence of a phase transition in QCD up to densities of several times nuclear saturation density.
Cite
@article{arxiv.2209.05267,
title = {Enhanced dilepton emission from a phase transition in dense matter},
author = {O. Savchuk and A. Motornenko and J. Steinheimer and V. Vovchenko and M. Bleicher and M. Gorenstein and T. Galatyuk},
journal= {arXiv preprint arXiv:2209.05267},
year = {2022}
}
Comments
8 pages, 5 figures