A gap in the quarkyonic matter

Details A gap in the quarkyonic matter A gap in the quarkyonic matter

2008-03-11

arxiv.org/abs/0803.1636v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pp, 4 figures, a footnote that the same result will persist for the 't Hooft model has been added

Scientific paper

It has recently been suggested that at a reasonably large chemical potential a confining quarkyonic matter is formed that consists of the quark Fermi sea and confined hadrons on top of this Fermi sea. We study some properties of this matter. It is demonstrated that below the chiral restoration point there are gapless excitations of this matter through excitations of the Goldstone bosons. Above the chiral restoration point the single quarks are still removed from the spectrum of excitations and the only possible excitations are confined color-singlet hadrons with finite mass. Hence there appears a gap in the excitation spectrum of the quarkyonic matter that should be crucially important for its properties above the chiral restoration point. This gap is of a new type and is not related with the condensation of the fermionic system into a quasibosonic system. It is only due to such properties as confinement and manifest chiral symmetry at the same time.

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