Power-like corrections and the determination of the gluon distribution

Details Power-like corrections and the determination of the gluon distribution Power-like corrections and the determination of the gluon distribution

2006-10-06

arxiv.org/abs/hep-ph/0610078v1

Phys.Lett.B643:171-174,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1016/j.physletb.2006.10.053

Power-suppressed corrections to parton evolution may affect the theoretical accuracy of current determinations of parton distributions. We study the role of multigluon-exchange terms in the extraction of the gluon distribution for the Large Hadron Collider (LHC). Working in the high-energy approximation, we analyze multi-gluon contributions in powers of 1/Q^2. We find a moderate, negative correction to the structure function's derivative d F_2 / d \ln Q^2, characterized by a slow fall-off in the region of low to medium Q^2 relevant for determinations of the gluon at small momentum fractions.

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