Scalar-isoscalar excitation in dense quark matter

Details Scalar-isoscalar excitation in dense quark matter Scalar-isoscalar excitation in dense quark matter

2002-09-22

arxiv.org/abs/hep-ph/0209249v1

Phys.Rev. C67 (2003) 045202

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTeX, 11 pages, 4 figs

Scientific paper

10.1103/PhysRevC.67.045202

We study the spectrum of scalar-isoscalar excitations in the color-flavor locked phase of dense quark matter. The sigma meson in this phase appears as a four-quark state (of diquark and anti-diquark) with a well-defined mass and extremely small width, as a consequence of it's small coupling to two pions. The quark particle/hole degrees of freedom also contribute significantly to the correlator just above the threshold 2\Delta where \Delta is the superconducting gap.

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