Diffractive parton distributions from the analysis with higher twist

Details Diffractive parton distributions from the analysis with higher twist Diffractive parton distributions from the analysis with higher twist

2007-04-12

arxiv.org/abs/0704.1608v3

Phys.Rev.D76:114014,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 12 figures, significant improvements, version to be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.114014

Diffractive parton distributions of the proton are determined from fits to diffractive data from HERA. In addition to the twist--2 contribution, the twist--4 contribution from longitudinally polarised virtual photons is considered, which is important in the region of small diffractive masses. A new prediction for the longitudinal diffractive structure function is presented which differs significantly from that obtained in the pure twist--2 analyses.

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