Heavy quark coefficient functions at asymptotic values $Q^2 \gg m^2$

Details Heavy quark coefficient functions at asymptotic values $Q^2 \gg m^2$ Heavy quark coefficient functions at asymptotic values $Q^2 \gg m^2$

1996-01-19

arxiv.org/abs/hep-ph/9601302v1

Nucl.Phys.B472:611-658,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

56 pages plain LATEX, 11 Postscript figures

Scientific paper

10.1016/0550-3213(96)00228-3

In this paper we present the analytic form of the heavy-quark coefficient functions for deep-inelastic lepton-hadron scattering in the kinematical regime $Q^2 \gg m^2$ . Here $Q^2$ and $m^2$ stand for the masses squared of the virtual photon and heavy quark respectively. The calculations have been performed up to next-to-leading order in the strong coupling constant $\alpha_s$ using operator product expansion techniques. Apart from a check on earlier calculations, which however are only accessible via large computer programs, the asymptotic forms of the coefficient functions are useful for charm production at HERA when the condition $Q^2 \gg m_c^2$ is satisfied. Furthermore the analytical expressions can also be used when one applies the variable heavy flavour scheme up to next-to-leading order in $\alpha_s$.

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