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Article Dans Une Revue Journal of High Energy Physics Année : 2023

One-loop Lipatov vertex in QCD with higher $\epsilon$-accuracy

Résumé

The effective Reggeon-Reggeon-gluon vertex, known as Lipatov vertex, is the key ingredient that allows to develop the BFKL approach in QCD. Within the next-to-leading logarithmic approximation, it is sufficient to know its one-loop corrections, in dimensional regularization ($D=4+2\epsilon$), up to the constant term in the $\epsilon$-expansion. In the next-to-next-to-leading approximation, however, the one-loop Lipatov vertex is needed up to the order $\epsilon^2$. In this paper we present the expression for this vertex in dimensional regularization up to the required accuracy.

Dates et versions

hal-04017003 , version 1 (06-03-2023)

Identifiants

Citer

Victor S Fadin, Michael Fucilla, Alessandro Papa. One-loop Lipatov vertex in QCD with higher $\epsilon$-accuracy. Journal of High Energy Physics, 2023, 04, pp.137. ⟨10.1007/JHEP04(2023)137⟩. ⟨hal-04017003⟩
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