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Open Access Publications from the University of California

BFKL resummation effects in gamma* gamma* to rho rho

  • Author(s): Enberg, R.
  • Pire, B.
  • Szymanowski, L.
  • Wallon, S.
  • et al.

We calculate the leading order BFKL amplitude for the exclusive diffractive process \gamma*_L(Q12) \gamma*_L(Q22) \to \rho_L0 \rho_L0 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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