Elsevier

Nuclear Physics A

Volume 530, Issues 3–4, 12–19 August 1991, Pages 740-758
Nuclear Physics A

Thermodynamics of hadronic matter at high density

https://doi.org/10.1016/0375-9474(91)90777-4Get rights and content

Abstract

We calculate thermodynamics observables for an interacting relativistic hadron gas. Hadronic states are taken into account by the use of a sizeable portion of the experimental hadron spectrum, supplemented in some cases by an exponentially rising continuum. Calculations with non-zero baryon number densities, subject to the additional requirement of zero net strangeness, show structure in the heat capacity per unit volume of the baryon sector at a temperature of approximately 140 MeV. This structure also becomes visible in the total heat capacity per unit volume at large baryon number densities, and provides a signature for the change of the thermal response of the hadron gas from baryon- to meson-dominated, even though the meson number density is lower than the baryon number density. Furthermore, this structure is not seen in calculations with a massless hadron gas. Its origin is therefore associated with information contained in the hadronic mass spectrum, and thus with the sub-hadronic degrees of freedom of the hadrons.

References (19)

  • Review of Particle Properties

    Phys. Lett.

    (1990)
  • R.K. Pathria

    Statistical mechanics

    (1984)
  • S. Weinberg

    Phys. Rev.

    (1968)
  • J. Engels

    Z. Phys.

    (1989)
    B.M. Waldhauser

    Z. Phys.

    (1989)
    D.H. Rischke

    Phys. Lett.

    (1990)
    M.I. Gorenstein et al.

    Z. Phys.

    (1988)
  • H.G. Miller et al.

    Phys. Rev. Lett.

    (1989)
  • N.J. Davidson et al.
  • R. Tegen

    Nuovo Cim.

    (1977)
  • D.J. Gross

    Phys. Rev. Lett.

    (1985)
    D.J. GrossJ.H. Schwarz

    Phys. Reports

    (1982)
    M.B. Green

    Nature

    (1984)
  • N.J. Davidson et al.

    Phys. Lett.

    (1990)
There are more references available in the full text version of this article.

Cited by (3)

On leave from the Physics Department and the Schonland Research Centre for Nuclear Sciences, University of the Witwatersrand, Johannesburg.

View full text