Color superconducting quark matter in compact stars

Details Color superconducting quark matter in compact stars Color superconducting quark matter in compact stars

2007-12-02

arxiv.org/abs/0712.0117v1

"Exotic States of Nuclear Matter", U. Lombardo, M. Baldo, F. Burgio, H.-J. Schulze (Eds.), World Scientific, Singapore (2008)

Physics

Nuclear Physics

Nuclear Theory

8 pages, 3 figures, To appear in the proceedings of EXOCT 2007: International Symposium on Exotic States of Nuclear Matter, Ca

Scientific paper

Recent indications for high neutron star masses (M \sim 2 M_sun) and large radii (R > 12 km) could rule out soft equations of state and have provoked a debate whether the occurence of quark matter in compact stars can be excluded as well. We show that modern quantum field theoretical approaches to quark matter including color superconductivity and a vector meanfield allow a microscopic description of hybrid stars which fulfill the new, strong constraints. For these objects color superconductivity turns out to be an essential ingredient for a successful description of the cooling phenomenology in accordance with recently developed tests. We discuss the energy release in the neutrino untrapping transition as a new aspect of the problem that hybrid stars masquerade themselves as neutron stars. Quark matter searches in future generations of low-temperature/high-density nucleus-nucleus collision experiments such as low-energy RHIC and CBM @ FAIR might face the same problem of an almost crossover behavior of the deconfinement transition. Therefore, diagnostic tools shall be derived from effects of color superconductivity.

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