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Prog. Theor. Phys. Vol. 112 No. 5 (2004) pp. 831-854

[ Full Text PDF : FREE ACCESS (366K) ]

Effective Hadron Masses and Effective Interactions in Nuclear Matter

Hiroaki Kouno,1 Yasushi Horinouchi1 and Kunito Tuchitani2

1Department of Physics, Saga University, Saga 840-8502, Japan
2Saga High School of Technology, Saga 840-0841, Japan

(Received May 12, 2004)

Abstract:

Relations among effective hadron masses, effective interactions and equations of state are studied using a generalized mean-field theory that includes the implicit and explicit density dependence of the effective masses and couplings. We find that we can make the effective ω-meson mass smaller and the equation of state softer simultaneously if the ω-meson mean field is proportional to the baryon density. In this case, there is a simple and exact relation between the effective ω-meson mass and the effective ω-nucleon coupling. According to this relation, the effective ω-nucleon coupling automatically decreases if the effective ω-meson mass decreases. Consequently, the equation of state becomes softer. An attempt to incorporate the QCD sum-rule results into the hadron field theory is also made.


URL : http://ptp.ipap.jp/link?PTP/112/831/
DOI : 10.1143/PTP.112.831

[ Full Text PDF : FREE ACCESS (366K) ] Citation:

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