BFKL resummation effects in gamma* gamma* --> rho rho
R. Enberg, B. Pire, L. Szymanowski, S. Wallon
Abstract
We calculate the leading order BFKL amplitude for the exclusive diffractive process γ*L(Q12) γ*L(Q22) ρL0 ρL0 in the forward direction, which can be studied in future high energy e+e- linear colliders. The resummation effects are very large compared to the fixed-order calculation. We also estimate the next-to-leading logarithmic corrections to the amplitude by using a specific resummation of higher order effects and find a substantial growth with energy, but smaller than in the leading logarithmic approximation.
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