Pole decomposition of BFKL eigenvalue at zero conformal spin and the real part of digamma function

Pole decomposition of BFKL eigenvalue at zero conformal spin and the real part of digamma function

We consider the powers of leading order eigenvalue of the Balitsky-Fadin-Kuraev-Lipatov (BFKL) equation at zero conformal spin. Using reflection identities of harmonic sums we demonstrate how involved generalized polygamma functions are introduced by pole separation of a rather simple digamma functi...

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Bibliographic Details
Main Authors: Mohammad Joubat, Claudelle Capasia Madjuogang Sandeu, Alex Prygarin
Format: Article
Language:English
Published: Elsevier 2024-01-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269323006536

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