Effective Masses of Mesons and Nucleon in Hot Medium for the Walecka Model

Chin. Phys. Lett.

1996, Vol. 13

Issue (2): 89-92 DOI:

Original Articles

Effective Masses of Mesons and Nucleon in Hot Medium for the Walecka Model

GAO Song;ZHANG Yi-jun SU Ru-keng¹

Department of Physics, Fudan University, Shanghai 200433 ¹CCAST (World Laboratory), P. O. Box 8730, Beijing 100080 and Department of Physics, Fudan University, Shanghai 200433

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GAO Song, ZHANG Yi-jun SU Ru-keng 1996 Chin. Phys. Lett. 13 89-92

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Abstract Based on the thermo-field dynamics, the temperature and density dependencies of the effective masses of σ, ω mesons and nucleon in the walecka model have been calculated. The vacuum fluctuation effect is examined. It is found that the vacuum fluctuation is very important and leads to a reduction of ω-meson mass and an enhancement of σ-meson mass in hot and dense medium.

Keywords: 21.65.+f 12.40.Vv 13.75.Lb

Published: 01 February 1996

PACS:	21.65.+f
	12.40.Vv	(Vector-meson dominance)
	13.75.Lb	(Meson-meson interactions)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1996/V13/I2/089

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