Density Effects on the Fermion and the Scalar and Pseudoscalar Mesons in the QCD-Like Gauged NJL Model

Jiang Weizhou; Qiu Xijun

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 1999, Vol. 23> Issue(5) : 481-488

Density Effects on the Fermion and the Scalar and Pseudoscalar Mesons in the QCD-Like Gauged NJL Model

Jiang Weizhou ^, ,
Qiu Xijun

Changhai Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 2018002 Department of Physics, Shanghai Univarsity, shanghai 201800

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Abstract：
The QCD-like gauged NJL model with flavors N_f=2 is developed to derive the gap equation for the fermion in nuclear medium. In the free space, the gluon part in the gauged NJL model may contribute nearly 1/4 to the fermion mass. The chiral order parameter is consistent closely with the prediction of the QCD sum rules. Based on the gap equation, the fermion mass in nuclear medium is obtained and the dynamical properties of the scalar and pseudoscalar mesons are studied. The numerical results in the free space are in fair agreement with the experimental data.

References

[1]

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Jiang Weizhou and Qiu Xijun. Density Effects on the Fermion and the Scalar and Pseudoscalar Mesons in the QCD-Like Gauged NJL Model[J]. Chinese Physics C, 1999, 23(5): 481-488.

Jiang Weizhou and Qiu Xijun. Density Effects on the Fermion and the Scalar and Pseudoscalar Mesons in the QCD-Like Gauged NJL Model[J]. Chinese Physics C, 1999, 23(5): 481-488. shu

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Received: 1998-04-06
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Density Effects on the Fermion and the Scalar and Pseudoscalar Mesons in the QCD-Like Gauged NJL Model

Jiang Weizhou ^,
Qiu Xijun

Corresponding author: Jiang Weizhou,

Changhai Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 2018002 Department of Physics, Shanghai Univarsity, shanghai 201800

Received Date: 1998-04-06
Accepted Date: 1900-01-01
Available Online: 1999-05-05

Abstract: The QCD-like gauged NJL model with flavors N_f=2 is developed to derive the gap equation for the fermion in nuclear medium. In the free space, the gluon part in the gauged NJL model may contribute nearly 1/4 to the fermion mass. The chiral order parameter is consistent closely with the prediction of the QCD sum rules. Based on the gap equation, the fermion mass in nuclear medium is obtained and the dynamical properties of the scalar and pseudoscalar mesons are studied. The numerical results in the free space are in fair agreement with the experimental data.