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Strange-quark matter within the Nambu-Jona-Lasinio model

  • 90th Anniversary of A.B. Migdal’s Birthday
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Abstract

The equation of state of baryon-rich quark matter is studied within the SU(3) Nambu-Jona-Lasinio model with flavor-mixing interaction. Possible bound states (strangelets) and chiral phase transitions in this matter are investigated at various values of the strangeness fraction r s. Model predictions are very sensitive to the ratio of the vector and scalar coupling constants, ξ=G V/G S. At ξ=0.5 and zero temperature, the binding energy takes a maximum value of about 15 MeV per baryon at r s⋍0.4. Such strangelets are negatively charged and have typical lifetimes of about 10−7s. Calculations are performed at finite temperatures as well. According to these calculations, bound states exist up to temperatures of about 15 MeV. The model predicts a first-order chiral phase transition at finite baryon densities. The parameters of this phase transition are calculated as functions of r s.

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Authors and Affiliations

  1. Russian Research Centre Kurchatov Institute, pl. Kurcha-tova 1, Moscow, 123182, Russia

    I. N. Mishustin & L. M. Satarov

  2. Institut für Theoretische Physik, Universität Frankfurt, Postfach 111932, Robert-Mayer-Strasse 8-10, D-60054, Frankfurt am Main, Germany

    I. N. Mishustin, L. M. Satarov, H. Stöcker & W. Greiner

  3. Niels Bohr Institute, Blegdamsvej 17, DK-2100, Copenhagen, Denmark

    I. N. Mishustin

Authors
  1. I. N. Mishustin
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  2. L. M. Satarov
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  3. H. Stöcker
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  4. W. Greiner
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Additional information

From Yadernaya Fizika, Vol. 64, No. 5, 2001, pp. 866–876.

Original English Text Copyright © 2001 by Mishustin, Satarov, Stöcker, Greiner.

This article was submitted by the authors in English.

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Mishustin, I.N., Satarov, L.M., Stöcker, H. et al. Strange-quark matter within the Nambu-Jona-Lasinio model. Phys. Atom. Nuclei 64, 802–811 (2001). https://doi.org/10.1134/1.1378870

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  • DOI: https://doi.org/10.1134/1.1378870

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