Medium Effects on Dynamical Properties of the Fermion and Mesons in the Gauged Nambu- Jona-Lasinio Model

Chin. Phys. Lett.

1998, Vol. 15

Issue (9): 639-641 DOI:

Original Articles

Medium Effects on Dynamical Properties of the Fermion and Mesons in the Gauged Nambu- Jona-Lasinio Model

JIANG Wei-zhou¹;QIU Xi-jun^1,2

¹Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800 ²Department of Physics, Shanghai University, Shanghai 201800

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JIANG Wei-zhou, QIU Xi-jun 1998 Chin. Phys. Lett. 15 639-641

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Abstract The gap equation for the fermion in the gauged Nambu-Jona-Lasinio (NJL) model is derived in nuclear medium with flavors N_f = 2. Based on the gap equation, the fermion mass in nuclear medium is obtained and used to determine the properties of the scalar and pseudoscalar mesons. In contrast to the NJL model, the gluonic part has the one-fourth contribution to the fermion mass. The critical density with the chiral symmetry restored is about 6ρ₀.

Keywords: 21.65.+f 14.40.-n 11.30.Rd

Published: 01 September 1998

PACS:	21.65.+f
	14.40.-n	(Mesons)
	11.30.Rd	(Chiral symmetries)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1998/V15/I9/0639

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