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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Kern- und Teilchen-Astrophysik
HK 21.8: Vortrag
Dienstag, 13. März 2007, 18:45–19:00, E
Color-spin locking in a selfconsistent Dyson-Schwinger approach — •Florian Marhauser1,2, Dominik Nickel2, Michael Buballa2, and Jochen Wambach2,3 — 1Institut für theoretische Physik, Univeristät Heidelberg — 2Institut für Kernphysik, Technische Universtität Darmstadt — 3Gesellschaft für Schwerionenforschung, Darmstadt
We investigate the color-spin locked (CSL) phase of spin-one color superconducting quark matter using a truncated Dyson-Schwinger equation for the quark propagator in Landau gauge. Starting from the most general parity conserving ansatz allowed by the CSL symmetry, the Dyson-Schwinger equation is solved self-consistently and dispersion relations are discussed. We find that chiral symmetry is spontaneously broken due to terms which have previously been neglected. As a consequence, the excitation spectrum contains only gapped modes even for massless quarks. Moreover, at moderate chemical potentials the quasiparticle pairing gaps are several times larger than expected from extrapolated weak-coupling results.