Parametric Expression forp−pOff-Energy-Shell Matrix Elements andp−pBremsstrahlung

An equation is derived which expresses the off-energy-shell matrix elements of the $p-p$ interaction in a form analogous to the phase-shift expansion for elastic scattering. "Quasiphase parameters" which play the role of phase shifts in this expression are calculated from phenomenological potentials. $p-p$ bremsstrahlung, with gamma rays observed perpendicular to the scattering plane of the incident proton, is discussed as a process which may permit experimental study of these parameters.