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arXiv · hep-ph/9911433

The color dipole BFKL-Regge expansion: from DIS on protons to pions to rise of hadronic cross sections

N. N. Nikolaev·J. Speth·V. R. Zoller
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Abstract

As noticed by Fadin, Kuraev and Lipatov in 1975 incorporation of asymptotic freedom into the BFKL equation splits the QCD pomeron into a series of isolated poles in complex angular momentum plane. Following our earlier work on the proton structure function we explore the phenomenological consequences of the emerging BFKL-Regge factorized expansion for the small-$x$ structure function of the pion $F_{2π}(x,Q^2)$. We calculate $F_{2π}$ in a small-$x$ region and find good agreement with the recent H1 determination of $F_{2π}(x,Q^2)$. We also present the BFKL-Regge factorization based evaluation of the contribution from hard scattering to the observed rise of the $NN$, $πN$ and real photo-absorption $γN$ and $γπ$ total cross sections.

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N. N. Nikolaev, J. Speth, V. R. Zoller. 1999-12-22. The color dipole BFKL-Regge expansion: from DIS on protons to pions to rise of hadronic cross sections. https://doi.org/10.1016/s0370-2693(99)01474-4

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