Two loop matching conditions on $\bar{\rm MS}$ parton densities

Details Two loop matching conditions on $\bar{\rm MS}$ parton densities Two loop matching conditions on $\bar{\rm MS}$ parton densities

2000-05-24

arxiv.org/abs/hep-ph/0005243v1

Nucl.Phys.Proc.Suppl. 89 (2000) 149-154

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex with six figures

Scientific paper

10.1016/S0920-5632(00)00837-9

We discuss how the operator product expansion (OPE) can be used to derive asymptotic expressions for certain integrals. This yields operator matrix elements (OME's) which determine the matching conditions for $\bar{\rm MS}$ parton densities across heavy flavour thresholds. Then we construct four and five-flavour densities from a three-flavour set via the AP equation using LO and NLO splitting functions.

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