Particularities of the NNLLA BFKL

Abstract

Peculiar properties of the BFKL approach in the next-to-next-to-leading logarithmic approximation (NNLLA) are discussed. In this approximation the scheme of derivation of the BFKL equation must be changed because of violation of the simple factorized form of amplitudes with multi-Reggeon exchanges and necessity to take into account imaginary parts of amplitudes in the unitarity relations.

7 pages; Invited talk presented at the International Workshop on Diffraction in High-Energy Physics, September 2 - 8, 2016, Acireale, Italy

References in corpus (2)

• Proof of the multi-Regge form of QCD amplitudes with gluon exchanges in the NLA
• Analyzing high-energy factorization beyond next-to-leading logarithmic accuracy

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