From hot lattice QCD to cold quark stars - Schulze, Robert
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The work connects the fields of Elementary Particle-, Collider- and Astrophysics. A thermodynamic model of the quark-gluon plasma using quasiparticle degrees of freedom based on the hard thermal loop self-energies is introduced. It provides a link between an established quasiparticle model - following from the former using a series of approximations - and QCD - from which the former is derived using the Cornwall-Jackiw-Tomboulis formalism and a special parametrization of the running coupling. Both models allow for an extrapolation of first-principle QCD results available at small chemical…mehr

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Produktbeschreibung
The work connects the fields of Elementary Particle-, Collider- and Astrophysics. A thermodynamic model of the quark-gluon plasma using quasiparticle degrees of freedom based on the hard thermal loop self-energies is introduced. It provides a link between an established quasiparticle model - following from the former using a series of approximations - and QCD - from which the former is derived using the Cornwall-Jackiw-Tomboulis formalism and a special parametrization of the running coupling. Both models allow for an extrapolation of first-principle QCD results available at small chemical potentials using Monte-Carlo methods to large net baryon densities with remarkably similar results. They are used to construct equations of state for heavy-ion collider experiments at SPS and FAIR as well as quark and neutron star interiors. A mixed-phase construction allows for a connection of the SPS equation of state to the hadron resonance gas including an extension to the weak sector. From the extrapolation of the most recent lattice results the existence of bound pure quark stars is not suggested. However, quark matter might exist in a hybrid phase in cores of neutron stars.
Autorenporträt
He received his Diploma in Physics from the Technical University in Dresden, Germany, in 2007 where, in 2011, he also obtained his Ph.D. in Theoretical Physics while working at the Helmholtz-Zentrum Dresden-Rossendorf. He is currently working as Risk Modelling and Methodologies Professional at UniCredit Bank AG (HypoVereinsbank) in Munich.