Abstract

We study the effective mass of nucleon from chiral perturbation theory in the finite chemical potential. By including in the chiral Lagrangian a chemical potential conjugating to the baryon number density, the calculation of integration over meson momentum has to face complex plain which gives the chemical potential dependence of nucleon mass in dense matter. The results indicate that the interaction between nucleons is attractive at first and then repulsive as the chemical potential increases.

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