Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-11-23
Z.Phys. C72 (1996) 99-106
Physics
High Energy Physics
High Energy Physics - Phenomenology
20pages, uuencoded postscript, figures included
Scientific paper
10.1007/s002880050228
We discuss some theoretical uncertainties in the calculation of the cross section for charm production in charged current deep inelastic neutrino scattering related to ambiguities in the treatment of terms which are singular in the limit of a vanishing charm mass. In particular we compare the so-called variable flavour scheme where these terms are absorbed in the parton distribution functions containing the charm as an active flavour, with the so-called fixed flavour scheme with no charm mass subtraction where the charm appears only in the final state of fixed-order scattering matrix elements. Using available parametrizations of parton distribution functions we find that the two schemes lead to largely differing results for separate structure functions whereas the differences cancel to a large extent in the total cross section in that kinematical region which has been measured so far.
Kramer Georgiana
Lampe Bodo
Spiesberger Hubert
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