Darmstadt 2008 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 34: Postersitzung
HK 34.80: Poster
Donnerstag, 13. März 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.