Weak and electromagnetic effects in large pT proton-proton collisions

The weak and electromagnetic contributions to the inclusive cross section for hadron production at large p_T in proton ISR experiments are calculated using the parton model. When compared with extrapolations of recent strong interaction data, it is found that they overtake the strong cross section at large p_T for beam energies of several hundred GeV at a cross section which might be accessible (assuming a reasonable W boson mass in the weak case). Further, the parity violating effects of the weak interaction are found to be large and thus in principle could give an unambigous signature to weakly produced events, using polarised beams.