Diquark clusters in the quark-gluon plasma

John F. Donoghue; K. S. Sateesh

doi:10.1103/PhysRevD.38.360

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Diquark clusters in the quark-gluon plasma

John F. Donoghue and K. S. Sateesh

Department of Physics and Astronomy, University of Massachusetts, Amherst, Massachusetts 01003

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Phys. Rev. D 38, 360 – Published 1 July, 1988

DOI: https://doi.org/10.1103/PhysRevD.38.360

Abstract

We explore the possibility that pairs of quarks will form diquark clusters in the density regime above the deconfinement transition for hadronic matter at finite density. We use a simple model and find that the spin interactions of quarks provide a significant lowering of the energy for diquark combinations. A modified P-matrix method is used in order to calculate the density dependence of this effect. It is found that, within the model, a diquark configuration has a lower energy than a quark gas for a significant range of densities above deconfinement, although at very high densities a free quark phase is preferred.

References (15)

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[c1] J. Cleymans, R. V. Gavai and E. Suhonen, Phys. Rep. 130, 217 (1986).

[c2] L. McLerran, Rev. Mod. Phys. 58, 1021 (1986).

[c3] H. Satz, in Quark Matter '84, proceedings of the Fourth International Conference, Helsinki, 1984, edited by K. Kajantie (Lecture Notes in Physics, No. 221) (Springer, Berlin, 1985), p. 278.

[c4] B. Muller, in The Physics of Quark Gluon Plasma, edited by H. Araki et al. (Lecture Notes in Physics, Vol. 225) (Springer, Berlin, 1985), p. 23.

[c5] T. DeGrand, R. L. Jaffe, K. Johnson and J. Kiskis, Phys. Rev. D 12, 2060 (1975).

[c6] R. L. Jaffe and F. E. Low, Phys. Rev. D 19, 2105 (1979).

[c7] R. Hagedorn, CERN Report No. CERN-TH 4100/85 (unpublished).

[c8] S. Ekelin, Stolkholm Report No. TRITA-TFY-86-16 (unpublished).

[c9] R. L. Jaffe, Phys. Rev. D 15, 267 (1977).

[c10] R. L. Jaffe, Phys. Rev. D 15, 281 (1977).

[c11] C. Quigg, in Gauge Theories in High Energy Physics, Les Houches Summer School of Theoretical Physics 1981, edited by M. K. Gaillard and R. Stora (North-Holland, Amsterdam, 1983).

[c12] J. Patera and D. Sankoff, Tables of Branching Rules for Representations of Simple Lie Algebras (Les presses De L'Universite De Montreal, Montreal, 1973).

[c13] J. D. Jackson, Annu. Rev. Nucl. Part. Sci. 33, 105 (1983).

[c14] D. Bailin and A. Love, Nucl. Phys. B190, 175 (1981).

[c15] D. Bailin and A. Love, Nucl. Phys. B205, 119 (1982).

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