Spectral Continuity in Dense QCD

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Hatsuda, Tetsuo
Tachibana, Motoi
Yamamoto, Naoki
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Abstract
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The vector mesons in three-flavor quark matter with chiral and diquark condensates are studied using the in-medium QCD sum rules. The diquark condensate leads to a mass splitting between the flavor-octet and flavor-singlet channels. At high density, the singlet vector meson disappears from the low-energy spectrum, while the octet vector mesons survive as light excitations with a mass comparable to the fermion gap. A possible connection between the light gluonic modes and the flavor-octet vector mesons at high density is also discussed.
Comment: 4 pages, 3 figures; version to appear in Phys. Rev. D
Keywords
High Energy Physics - Phenomenology, Nuclear Theory
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