Eur. Phys. J. C 25, 453-458 (2002)
DOI: 10.1007/s10052-002-01024-8

Compressible bag model and the phase structure

S. Kagiyama¹, S. Kumamoto¹, A. Minaka², A. Nakamura¹, K. Ohkura¹ and S. Yamaguchi<sup>1

1</sup>  Department of Physics, Faculty of Science, Kagoshima University, Kagoshima 890-0065, Japan
²  Department of Physics, Faculty of Education, Kagoshima University, Kagoshima 890-0065, Japan

(Received: 22 February 2002 / Revised version: 28 June 2002 / Published online: 20 September 2002 )

Abstract
The phase structure of hadrons and the quark-gluon plasma is investigated by two types of equation of state of the hadrons, namely the ideal hadron gas model and the compressible bag model. It is pointed out that, while the ideal gas model produces an unrealistic extra hadron phase, the compressible bag model gives the expected and reasonable phase diagram even if the rich hadron spectrum is taken into account.

© Società Italiana di Fisica, Springer-Verlag 2002