S-wave Meson-nucleon Interactions and the Meson Mass in Nuclear Matter from Chiral Eeective Lagrangians
نویسنده
چکیده
Chiral eeective lagrangians may diier in their prediction of meson-nucleon scattering amplitudes oo-meson-mass-shell, but must yield identical S-matrix elements. We argue that the eeective meson mass in nuclear matter obtained from chiral eeective lagrangians is also unique. OO-mass-shell amplitudes obtained using the PCAC choice of pion eld must therefore not be viewed as fundamental constraints on the dynamics, the determination of the eeective 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 eeective mass in two commonly employed formulations of chiral perturbation theory which yield diierent meson-nucleon scattering amplitudes oo-meson-mass-shell.
منابع مشابه
S-wave Meson-Nucleon Interactions and the Meson Mass in Nuclear Matter from Chiral Effective Lagrangians
Chiral effective lagrangians may differ in their prediction of meson-nucleon scattering amplitudes off-meson-mass-shell, but must yield identical S-matrix elements. We argue that the effective meson mass in nuclear matter obtained from chiral effective lagrangians is also unique. Off-mass-shell amplitudes obtained using the PCAC choice of pion field must therefore not be viewed as fundamental c...
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