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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Postersitzung

HK 34.80: Poster

Thursday, March 13, 2008, 14:00–16:00, Poster C3

Pseudoscalar Goldstone bosons in the color-flavor locked phase at moderate densities — •Verena Kleinhaus¹, Michael Buballa¹, Dominik Nickel¹, and Micaela Oertel² — ¹Institut für Kernphysik, TU Darmstadt — ²LUTH, Observatoire de Paris-Meudon

We present a study of the properties of the pseudoscalar Goldstone bosons in the color-flavor locked phase of quark matter at moderate densities. We construct the Goldstone bosons explicitly by solving the Bethe-Salpeter equation for quark-quark scattering within a model of the Nambu-Jona-Lasinio type.

With this procedure we are able to study the pion decay constant and the masses of the flavored and unflavored (pseudo-) Goldstone bosons for equal quark masses as well as for unequal quark masses. We show a comparison of our results with the predictions of the low-energy effective field theory and discuss the deviations from results obtained in the weak-coupling limit.

In addition to the Goldstone bosons we find higher excitations which have finite masses even in the chiral limit. Most of these are stable.