DOI 10.1007/s100520000179
High-twist contribution to the longitudinal
structure function
FL at high x
S.I. Alekhin
Institute for High Energy Physics, Protvino, 142284, Russia
()
alekhin@mx.ihep.su
Received: 21 April 1999 / Revised version: 17 June 1999 /
Published online: 27 January 2000 - © Springer-Verlag 2000
2000
Abstract
We perform the NLO QCD fit to the combined deep inelastic scattering
(DIS) data at high x from the SLAC, BCDMS, and NMC collaborations.
The model-independent x shape of the high-twist contribution to
structure function
FL is extracted. The twist-4
contribution to
FL is found to be in a qualitative
agreement with the predictions of the infrared renormalon model. The
twist-6 contribution exhibits a weak trend to negative values, although
on the whole, it is compatible with zero within the errors.
Copyright Springer-Verlag 2000
