Diffractive Parton Distributions from Fits with Higher Twist
Krzysztof Golec-Biernat, Agnieszka Luszczak
TL;DR
This paper extracts diffractive parton distributions from HERA data by incorporating higher twist effects, notably from longitudinal photons, significantly impacting the gluon distribution and structure functions at large beta.
Contribution
It introduces a novel fit including twist-4 contributions, improving the understanding of diffractive gluon distributions and structure functions in proton scattering.
Findings
Enhanced diffractive gluon distribution at large beta
Significant impact of twist-4 contributions on structure functions
Improved fits to HERA data with higher twist effects
Abstract
We determine diffractive parton distributions of the proton from DGLAP based fits to HERA data including the twist--4 contribution from longitudinal polarized virtual photons, which is known to be important in the region of large beta. The biggest impact of this contribution is on the diffractive gluon distribution and on the diffractive longitudinal structure function to be determined from HERA data.
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