NLO corrections to the hard pomeron behavior of the charm structure functions Fkc (k=2,L) at low x

摘要

We show that the charm structure functions Fkc have a hard pomeron behavior at low x, as the gluon distribution is dominated by the hard (Lipatov) pomeron at small x and all Q2 values. It is shown that the charm structure functions obtained, using the gluon distribution functions, are in agreement with data from HERA in the next-to-leading analysis (NLO). Having checked that this behavior gives the charm structure functions exponent independent of x. With respect to the hard (Lipatov) pomeron for the low- x gluon distribution, we provide a compact formula for the ratio Rc=FLc/F2c that is approximately independent of x at low x and its independent of the input gluon distribution function at all Q2 values.