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The Unintegrated Gluon Density in the Photon and Heavy Quark Production

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arxiv hep-ph/0402019 v2 pith:UMCOVDTH submitted 2004-02-02 hep-ph

classification hep-ph
keywords heavycollisionscrossdensitygluonproductionquarkgamma
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The production cross section of heavy quarks in real and virtual photon-photon collisions has been studied. The unintegrated gluon density in the photon was obtained using the full CCFM evolution equation for the first time. The gluon density was implemented in the Monte Carlo generator CASCADE, and cross sections for heavy quark production in $e^+e^-$ collisions were calculated and compared to LEP data. Also, predictions for heavy quark cross sections in $e^+e^-$ and $\gamma\gamma$ collisions at TESLA energies are given.

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