Higher-Order Corrections to Semileptonic Weak Processes

Using a strong formulation of lepton-hadron universality, higher order corrections to semileptonic weak processes are related to the high energy behavior of lepton-lepton weak scattering amplitudes. The *‘weak cutofP’ estimates of N 4 GeV from the observed KL-KS mass difference and 16 GeV from the absence of the decay KL p+pare interpreted as upper bounds on the center-of-mass energy at which cross sections for pure leptonic processes deviate significantly from the low energy phenomenological predictions. A phenomenology for describing similar deviations in high energy neutrino-nucleon reactions is developed. A sum rule relating such deviations is derived, as well as estimates of their order of magnitude using the parton model. (Submitted to Phys. Rev. D. ) *Work supported in part by the U. S. Atomic Energy Commission.