Paper
Order α_s^2 Contributions to charm production in charged-current deep-inelastic lepton-hadron scattering
Authors
M. Buza, W. L. van Neerven
Abstract
The most important part of the order corrections to the charm component of the charged-current structure functions and have been calculated. This calculation is based on the asymptotic form of the heavy-quark coefficient functions corresponding to the higher order corrections to the W-boson-gluon fusion process. These coefficient functions which are in principle only valid for can be also used to estimate the order contributions at lower values provided . It turns out that the above corrections are appreciable in the large -region and they explain the discrepancy found for the structure functions between the fixed-flavour scheme (FFS) and the variable-flavour-number scheme (VFNS). These corrections also hamper the extraction of the strange-quark density from the data obtained for the charged-current and the electromagnetic-current processes.