We study the meson-meson and meson-baryon interactions in lattice QCD. The simulation is performed on 203 × 24 lattice at β = 5.7 using Wilson gauge action and Wilson fermion at the quenched level. By adopting one static quark for each hadron as “heavy-light meson" and “heavy-light-light baryon", we define the distance r of two hadrons and extract the inter-hadron potential from the energy diff...

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...

Up to the present much work on meson theory has. been done by considering it as a field theory, and the equation of meson as a field equation. This situation has its origin in the fact that the meson was found originally as a field of the heavy particles. However, if we restrict ourselves to the problems of the interaction between the meson and the electromagnetic field, it seems more adequate ...

We present flavour-symmetric couplings for the OZI-allowed three-meson vertices of effective meson theories, which for the case of the two-meson channels to which the flavoursinglet scalar meson couples, are endowed with a correction factor with respect to the standard formula.

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 constrain...