Abstract
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 multigluon contributions in powers of 1/Q(2). We find a moderate, negative ...
Abstract
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 multigluon contributions in powers of 1/Q(2). We find a moderate, negative correction to the structure function's derivative dF(2)-/d 1n 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. (c) 2006 Elsevier B.V. All rights reserved.
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