Deep inelastic scattering off quark-gluon plasma and its photon emissivity
| Autor: | Harvey B. Meyer, Marco Cè, Tim Harris, Arianna Toniato, Csaba Török |
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| Přispěvatelé: | Meyer, H, Cè, M, Harris, T, Toniato, A, Török, C |
| Předmět: |
High Energy Physics::Lattice
High Energy Physics::Phenomenology High Energy Physics - Lattice (hep-lat) hep-lat FOS: Physical sciences hep-ph Particle Physics - Lattice Lattice QCD High Energy Physics - Phenomenology High Energy Physics - Lattice High Energy Physics - Phenomenology (hep-ph) Quark-Gluon Plasma High Energy Physics::Experiment Particle Physics - Phenomenology |
| Zdroj: | Scopus-Elsevier Proceedings of The 38th International Symposium on Lattice Field Theory — PoS(LATTICE2021) |
| Popis: | 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. Comment: 8 pages, 3 figures |
| Databáze: | OpenAIRE |
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