2024/06/20 by Ralf Rapp, Rapp, Ralf · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2406.14656
openalex publication_date 2024/06/20 · openalex created_date 2024/06/25 · openalex updated_date 2026/07/28
The electric conductivity, σ\rm el, is a fundamental transport coefficient of QCD matter that can be related to the zero-energy limit of the electromagnetic (EM) spectral function at vanishing 3-momentum in the medium. The EM spectral function is also the central quantity to describe the thermal emission rates and pertinent spectra of photon and dilepton radiation in heavy-ion collisions. Employing a model for dilepton rates that combines hadronic many-body theory with nonperturbative QGP emission constrained by lattice-QCD which describes existing dilepton measurements in heavy-ion collisions, we investigate the sensitivity of low-mass dilepton spectra in Pb-Pb collisions at the LHC to σ\rm el. In particular, we disentangle the contributions from QGP and hadronic emission, and identify signatures that can help to extract σ\rm el from high-precision experimental data expected to be attainable with future detector systems at the LHC.