High Momentum Transfer HERA Events and pQCD at High x

Abstract

We compare data on the proton structure function from SLAC experiments in the range of x between 0.7 and 0.97 in and near the resonance region with previous empirical fits to Deep Inelastic Scattering and with calculations from parton distribution functions. The data is in rough agreement with the empirical fits, but is an order of magnitude higher than the pQCD calculations at the highest x. This compares with the two orders of magnitude increase in the quark distributions at high x which seem to be necessary to explain the HERA high momentum transfer events.