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arxiv: hep-ph/9606427 · v2 · pith:AXISXAQPnew · submitted 1996-06-25 · ✦ hep-ph

Non Abelian qbar{q} contributions to small-x anomalous dimensions

classification ✦ hep-ph
keywords abeliananomalouscontributionsdimensionflavourgluonheavyproduction
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By using $\k$-factorization, we derive resummation formulas for the non-abelian $q\bar{q}$ contributions to both heavy flavour production by gluon fusion, and to the next-to-leading BFKL kernel. By combining this result with previous ones by Fadin et al. on the virtual terms, we also compute in closed form the complete $q\bar{q}$ contribution to the gluon anomalous dimension in the $Q_0$-scheme. We find that $q\bar{q}$ resummation effects are important for heavy flavour production, but are instead small in the anomalous dimension eigenvalues, because of a cancellation between abelian and non abelian contributions.

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