A novel factorization for F_L in the large x limit

1998/06/16 by R. Akhoury, Akhoury, R., M. G. Sotiropoulos +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9806388

Talk at DIS98, Brussels, Latex, 4 pages, uses sprocl.sty

arxiv created 1998/06/16 · arxiv updated 2009/11/30

Abstract

A novel factorization formula is presented for the longitudinal structure function F_L near the elastic region x → 1 of deeply inelastic scattering. In moment space this formula can resum all contributions to F_L that are of order ln^k N/N. This is achieved by defining a new jet function which probes the transverse momentum of the struck parton in the target at leading twist. The anomalous dimension γ_J^′ of this new jet operator generates in moment space the logarithmic enhancements coming from the fragmentation of the current jet in the final state. It is also shown how the suggested factorization for F_L is related to the corresponding one for F₂ in the same kinematic region.

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