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 nextto- leading logarithmic approximation, it is sufficient to know its one-loop corrections, in dimensional regularization (D = 4 + 2 ), up to the constant term in the  -expansion. In the next-to-next-to-leading approximation, however, the one-loop Lipatov vertex is needed up to the order  2. In this paper we present the expression for this vertex in dimensional regularization up to the required accuracy.

One-loop Lipatov vertex in QCD with higher ϵ-accuracy

Fucilla, Michael
Membro del Collaboration Group
;
Papa, Alessandro
Membro del Collaboration Group
2023-01-01

Abstract

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 nextto- leading logarithmic approximation, it is sufficient to know its one-loop corrections, in dimensional regularization (D = 4 + 2 ), up to the constant term in the  -expansion. In the next-to-next-to-leading approximation, however, the one-loop Lipatov vertex is needed up to the order  2. In this paper we present the expression for this vertex in dimensional regularization up to the required accuracy.
2023
High-energy perturbative QCD
BFKL resummation
Effective vertices
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/348617
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact