Deep inelastic scattering off quark-gluon plasma and its photon emissivity
Abstract
The photon emissivity of quark-gluon plasma probes the interactions in the medium and differs qualitatively between a weakly coupled and a strongly coupled plasma in the soft-photon regime. The photon emissivity is given by the product of kinematic factors and a spectral function associated with the two-point correlator of the electromagnetic current at lightlike kinematics. A certain Euclidean correlator at imaginary spatial momentum can be calculated in lattice QCD and is given by an integral over the relevant spectral function at lightlike kinematics. I present a first exploratory lattice calculation of this correlator. Secondly, I show how Euclidean correlators at imaginary spatial momenta can also be used to probe the regime of deep inelastic scattering off quark-gluon plasma, which reveals its parton distribution function.
Keywords
Cite
@article{arxiv.2112.00450,
title = {Deep inelastic scattering off quark-gluon plasma and its photon emissivity},
author = {Marco Cè and Tim Harris and Harvey B. Meyer and Arianna Toniato and Csaba Török},
journal= {arXiv preprint arXiv:2112.00450},
year = {2021}
}
Comments
8 pages, 3 figures