Swave mesonnucleon interactions and the meson mass in nuclear matter from chiral effective lagrangians
Abstract
Chiral effective lagrangians may differ in their prediction of mesonnucleon scattering amplitudes offmesonmassshell, but must yield identical Smatrix elements. We argue that the effective meson mass in nuclear matter obtained from chiral effective lagrangians is also unque. Offmassshell amplitudes obtained using the PCAC choice of pion field must therefore not be viewed as fundamental constraints on the dynamics, the determination of the effective meson mass in nuclear matter or the possible existence of meson condensates in the ground state of nuclear matter. This hypothesis is borne out by a calculation of the effective mass in two commonly employed formulations of chiral perturbation theory which yield different mesonnucleon scattering amplitudes offmesonmassshell.
 Publication:

Nuclear Physics A
 Pub Date:
 February 1995
 DOI:
 10.1016/03759474(95)00166X
 arXiv:
 arXiv:nuclth/9502003
 Bibcode:
 1995NuPhA.589..633T
 Keywords:

 Nuclear Theory;
 High Energy Physics  Phenomenology
 EPrint:
 23 pages, LaTeX, 2 Postscript figures (fig1.ps, fig2.ps)