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High Energy Physics - Phenomenology

arXiv:hep-ph/9807318 (hep-ph)
[Submitted on 9 Jul 1998]

Title:Three-Flavor QCD at High Density: Color Flavor Locking and Chiral Symmetry Breaking

Authors:Krishna Rajagopal (MIT)
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Abstract: We propose a symmetry breaking scheme for QCD with three massless quarks at high baryon density wherein the color and flavor SU(3)_{color}xSU(3)_{L}xSU(3)_{R} symmetries are broken down to the diagonal subgroup SU(3)_{color+L+R} by the formation of a condensate of quark Cooper pairs. We discuss general properties that follow from this hypothesis, including the existence of gaps for quark and gluon excitations, the existence of Nambu-Goldstone bosons which are excitations of the diquark condensate, and the existence of a modified electromagnetic gauge interaction which is unbroken and which assigns integral charge to the elementary excitations. We present mean-field results for a Hamiltonian in which the interaction between quarks is modelled by that induced by single-gluon exchange. We find gaps of order 10-100 MeV for plausible values of the coupling. We discuss the effects of nonzero temperature, nonzero quark masses and instanton-induced interactions on our results.
Comments: 13 pages, latex with espcrc1, 2 figures. Invited talk given at the Bielefeld workshop on QCD at Finite Density, 27-30 April 1998
Subjects: High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Report number: MIT-CTP-2757
Cite as: arXiv:hep-ph/9807318
  (or arXiv:hep-ph/9807318v1 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/9807318
Journal reference: Nucl.Phys. A642 (1998) 26-38
Related DOI: https://doi.org/10.1016/S0375-9474%2898%2900495-3

Submission history

From: Krisha Rajagopal [view email]
[v1] Thu, 9 Jul 1998 21:06:04 UTC (31 KB)
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