Scattering of one-dimensional bags in the interacting string formalism

We apply the interacting string formalism of Mandelstam to the scattering problem of one-dimensional bags. Lorentz covariance together with general properties of the path-integral formalism require that the number of constituent fields be 24 and that the ${(\mathrm{mass})}^{2}$, $\ensuremath{-}4\ensuremath{\pi}B{\ensuremath{\alpha}}_{0}$, of the ground state be $\ensuremath{-}4\ensuremath{\pi}B$. In this case, the $n$-point scattering amplitudes are precisely those of the dual resonance model. However, we also write the four-point scattering amplitudes for arbitrary ${\ensuremath{\alpha}}_{0}$. Then these still possess crossing symmetry but are not Lorentz covariant unless ${\ensuremath{\alpha}}_{0}=1$.