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Scalar-isoscalar excitation in dense quark matter

Prashanth Jaikumar·Ismail Zahed
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Abstract

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 2Δwhere Δis the superconducting gap.

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Prashanth Jaikumar, Ismail Zahed. 2002-09-22. Scalar-isoscalar excitation in dense quark matter. https://doi.org/10.1103/physrevc.67.045202

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