6533b82afe1ef96bd128b8ae
RESEARCH PRODUCT
Deep inelastic scattering off quark-gluon plasma and its photon emissivity
Harvey B. MeyerMarco CèTim HarrisArianna ToniatoCsaba Töröksubject
High Energy Physics::LatticeHigh Energy Physics::PhenomenologyHigh Energy Physics - Lattice (hep-lat)hep-latFOS: Physical scienceshep-phParticle Physics - LatticeLattice QCDHigh Energy Physics - PhenomenologyHigh Energy Physics - LatticeHigh Energy Physics - Phenomenology (hep-ph)Quark-Gluon PlasmaHigh Energy Physics::ExperimentParticle Physics - Phenomenologydescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-12-01 |