O( α_{s}^{2}) contributions to charm production in chargedcurrent deepinelastic leptonhadron scattering
Abstract
The most important part of the order α_{s}^{2} corrections to the charm component of the chargedcurrent structure functions F_{2} ( x, Q^{2}) and F_{3} ( x, Q^{2}) has been calculated. This calculation is based on the asymptotic form of the heavyquark coefficient functions corresponding to the higher order corrections to the Wbosongluon fusion process. These coefficient functions, which are in principle only valid for Q^{2} ≫ m^{2}, can also be used to estimate the order α_{s}^{2} contributions at lower Q^{2} values provided x < 0.1. It turns out that the above corrections are appreciable in the large Q^{2} region and they explain the discrepancy found for the structure functions between the fixedflavour scheme (FFS) and the variableflavournumber scheme (VFNS). These corrections also hamper the extraction of the strangequark density from the data obtained for the chargedcurrent and the electromagneticcurrent processes.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1997
 DOI:
 10.1016/S05503213(97)003271
 arXiv:
 arXiv:hepph/9702242
 Bibcode:
 1997NuPhB.500..301B
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 45 pages LaTeX, 17 Postscript Figures