The dispersion relation of pion in nuclear matter

Details The dispersion relation of pion in nuclear matter The dispersion relation of pion in nuclear matter

1997-09-09

arxiv.org/abs/nucl-th/9709019v1

Nucl.Phys. A618 (1997) 337-348

Physics

Nuclear Physics

Nuclear Theory

Latex, 7 eps files

Scientific paper

10.1016/S0375-9474(97)00026-2

We put forward a formalism to calculate the relativistic particle - hole and delta - hole excitation polarization insertion for pion propagator by using the particle - hole - antiparticle representation of nucleon and delta propagators in nuclear matter. The real and the imaginary part of the polarization insertion and the dispersion relation for pion propagator are calculated numerically. We find that the short range correlation enhances the delta - hole excitation but suppresses the particle - hole excitation, it also suppresses the pion condensation. We find that the effect of the short range correlation on the pion dispersion relation depends very much on the form of the short range correlation and the parameters involved.

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