S. Riemersma

Rates for Inclusive Deep-Inelastic Electroproduction of Charm Quarks at HERA

Abstract The coefficient functions for heavy flavour production in deeply inelastic electron hadron scattering have been calculated previously. These functions are so long that no analytic expressions could be published. Therefore we have tabulated them as two-dimensional arrays as is often done for the scale dependent parton densities. Using this computer program we present event rates for charm production at HERA in bins of x and Q 2 . These rates are insensitive to variations in the factorization and renormalization scale μ.

Complete next-to-leading order QCD corrections to the photon structure functions F2 gamma (x,Q2) and FL gamma (x,Q2).

We present the complete NLO QCD analysis of the photon structure functions

The Evolution of unpolarized and polarized structure functions at small x

F_2^gamma(x,Q^2)

Theoretical uncertainties in the QCD evolution of structure functions and their impact on αs(MZ2)

and

Leptoproduction of heavy quarks in the fixed and variable flavor schemes.

F_L^gamma(x,Q^2)

Heavy-quark production in eγ scattering

for a real photon target. In particular we study the heavy flavor content of the structure functions which is due to two different production mechanisms, namely collisions of a virtual photon with a real photon, and with a parton. We observe that the charm contributions are noticeable for

Gamma-gamma physics at LEP2

F_2^gamma(x,Q^2)

QCD corrections to FL (x, Q**2)

as well as

The Heavy-Flavour Contribution to Proton Structure

F_L^gamma(x,Q^2)

Deep-inelastic production of heavy quarks

in the x-region studied.