Mathematisch-Naturwissenschaftliche Fakultät

Institut für Physik

Fachgebiet: Theoretische Physik

Betreuer: Prof. Dr. David Blaschke

Dipl. Phys. Jens Berdermann
(e-mail: )

Equation of state and neutrino transport for superconducting quark matter in Neutron Stars

An effective field theoretical approach is presented for quark matter under neutron star constraints which describes the chiral phase transition as well as the appearance of color superconductivity on the self-consistent mean-field level. Phase diagrams and equations of state are evaluated for different parameter sets of effective coupling constants. Neutrino emissivities for the Urca process in quark matter with and without the influence of color-superconductivity are derived and evaluated consistently with the state variables calculated within the self-consistent mean-field approximation. In this work, for the first time, the cooling behaviour of quark stars in the color superconducting color-spin-locking (CSL) phase is evaluated using the obtained emissivities, specific heat and general-relativistic star configurations consistent with the derived equation of state. The obtained results are compared with those for the 2SC+X phase discussed in the literature as well as with astrophysical observational data. It is shown that the CSL phase investigated in this work provides a microscopically well-founded solution of the compact star cooling problem. In a phenomenological part of the work a model is presented which provides a possible explanation of Gamma Ray Bursts and pulsar kicks, as hitherto puzzling phenomena of astrophysics, on the basis of properties of superconducting quark matter and its neutrino propagation characteristics.