Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 24: Kern- und Teilchen-Astrophysik

HK 24.3: Talk

Tuesday, March 11, 2008, 12:00–12:15, 2B

Color superconducting quark matter in compact stars — David Blaschke¹, •Thomas Klaehn², Fredrik Sandin³, Christian Fuchs⁴, Amand Faessler⁴, Gerd Roepke⁵, Joachim Truemper⁶, and Stefan Typel⁷ — ¹Uni Wroclaw, Polen — ²ANL, USA — ³Lulea UT, Sweden — ⁴Uni Tuebingen, Germany — ⁵Uni Rostock, Germany — ⁶MPE Garching, Germany — ⁷GANIL, France

Recent indications for high neutron star masses (M ∼ 2  M_⊙) 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 essential for a successful description of the cooling phenomenology in accordance with recently developed tests. We discuss QCD phase diagrams for various conditions thus providing a basis for a synopsis for quark matter searches in astrophysics and in future generations of nucleus-nucleus collision experiments such as low-energy RHIC and CBM @ FAIR.