Author: Ratindranath Akhoury and Michael G. Sotiropoulos Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI 48109 George Sterman Institute for Theoretical Physics, SUNY at Stony Brook, Stony Brook, NY 11794
Title: A non-local OPE for hard QCD processes near the elastic limit
Abstract: A leading twist expansion in terms of bilocal operators is proposed for the structure functionsof deeply inelastic scattering near the elastic limit x ! 1, which is also applicable to a range ofother hard quasi-elastic processes. Operators of increasing dimensions contribute to logarithmicallyenhanced terms, which are suppressed by corresponding powers of 1 _ x. For the longitudinalstructure function in moment (N) space all the logarithmic contributions of order lnkN=N are shownto be resummable in terms of the anomalous dimension of the leading operator in the expansion.