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Density Dependence of the Mass and Decay Constant of Pion in Nuclear Matter in the Dyson--Schwinger Equation Approach of QCD |
| LIU Yu-Xin1,2,3,4;CHAO Jing-Yi1;CHANG Lei1;YUAN Wei |
| 1Department of Physics, Peking University, Beijing 100871
2Key Laboratory of Heavy Ion Physics (Ministry of Education), Peking University, Beijing 100871
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
4Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000 |
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LIU Yu-Xin, CHAO Jing-Yi, CHANG Lei et al 2005 Chin. Phys. Lett. 22 46-49 |
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Abstract With the Dyson--Schwinger equation formalism at finite chemical potential, we study the density dependence of the mass and decay constant of pion in nuclear matter. The calculated results indicate that both the mass and the decay constant remain almost constant at small chemical potential. As the chemical potential gets quite large, the decay constant increases and the mass decreases with the increasing of the chemical potential, and both of them vanish suddenly as a critical value is reached.
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| Keywords:
14.40.Aq
21.65.+f
11.10.Wx
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Published: 01 January 2005
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