Connection formulas between the different QCD orders in application to the valence parton distribution functions
O. Yu. Shevchenko , R. R. Akhunzyanov
Joint Institute for Nuclear Research, 141980 Dubna, Russia
Abstract
The formulas directly connecting
parton distribution functions (PDFs)
at the
leading (LO) and next to leading (NLO) QCD orders are applied with respect to
both
unpolarized and polarized valence PDFs. It is shown that the connection
formulas allow
without
any restriction on the allowed Q2 range for the analyzed data to produce
improved LO results on valence PDFs,
which strongly differ from the standard
parametrizations on these quantities, and which could be obtained within the
standard approach
only by using the data produced
at very high Q2 values (that is hardly possible in reality).