INTERPLAY OF HARD AND SOFT PROCESSES AT JLAB ENERGIES ANDREI AFANASEV and CARL E. CARLSON
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چکیده
Even at moderate energy machines, there is a regime where hard pion electroproduction proceeds by a perturbatively calculable process. The process, we claim, is not the leading twist fragmentation one but rather a higher twist process that produces kinematically isolated pions. Semiexclusive data may teach us more about parton distribution functions of the target and the pion distribution amplitude. In addition, there is a connection to generalized parton distribution calculations of exclusive processes in that the perturbative kernel is the same.
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تاریخ انتشار 2002