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Prog. Theor. Phys. Vol. 79 No. 1 (1988) pp. 120-140

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Neutral Pion Condensation and Alternating Layer Spin Model Including Isobar Δ(1232) in Hot Symmetric Nuclear Matter

Teiji Kunihiro, Tatsuyuki Takatsuka* and Ryozo Tamagaki**

Department of Natural Sciences, Ryukoku University, Kyoto 612
*College of Humanities and Social Sciences, Iwate University, Morioka 020
**Department of Physics, Kyoto University, Kyoto 606

(Received June 5, 1987)

Abstract:

Neutral pion condensation in the symmetric nuclear matter at finite temperature T is investigated with use of the Alternating Layer Spin model including explicitly the isobar Δ(1232) degree of freedom. The free energy F is calculated in the Hartree-Fock approximation with an extended effective baryon-baryon interaction based on the G-0 forces. It is shown that the neutral-pion condensed phase is realized as a first-order phase transition with a broad coexistence region of density, for example, from 2.5 ρ0 to 4.3 ρ0 at T = 30 MeV, ρ0 being the normal density. Implications of the results in high-energy heavy ion collisions are also discussed on the basis of a simple fluid dynamical model.


URL : http://ptp.ipap.jp/link?PTP/79/120/
DOI : 10.1143/PTP.79.120

[ Full Text PDF : FREE ACCESS (980K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 86 No. 1 (1991) pp. 57-71 :
    Phase Transition of Hot Neutron Matter to π0-Condensed State
    Mariko Takahara, Tatsuyuki Takatsuka and Katsuhiko Sato
  2. Progress of Theoretical Physics Supplement No.112 (1993) pp. 1-25 :
    Chapter I. Overview
    Ryozo Tamagaki
  3. Progress of Theoretical Physics Supplement No.112 (1993) pp. 123-157 :
    Chapter V. Toward Realistic Treatment of Neutral Pion-Condensed State
    Teiji Kunihiro, Tatsuyuki Takatsuka, Ryozo Tamagaki and Toshitaka Tatsumi
  4. Progress of Theoretical Physics Supplement No.112 (1993) pp. 197-219 :
    Chapter VII. Neutral Pion Condensation in Hot and Dense Nuclear Matter
    Teiji Kunihiro, Tatsuyuki Takatsuka and Ryozo Tamagaki

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