Séminaire de Physique Théorique
Regge limit of QCD in the Lipatov's EFT approachMaxim Nefedov (IJCLab, Orsay)
Thursday 07 December 2023 14:00 - Salle des séminaires - Salle 1180, bâtiment E2
Résumé :
The physics of QCD scattering amplitudes in the Regge limit, when the collision energy is much larger than any other scale, will be discussed using the Gauge-Invariant Effective Field Theory framework proposed by L.N. Lipatov [1]. The Rapidity Renormalisation Group, derivation of the BFKL equation, status of computation of one and two loop corrections in the formalism and perspectives of the computation of the NNLO correction to the kernel of BFKL equation in QCD will be presented. The connection with resummations of QCD corrections to coefficient functions of hard processes in QCD, enhanced by logarithms of partonic center of mass energy in the leading and next-to-leading logarithmic approximations will be discussed. The relation with physics of gluon saturation will be also touched upon.
[1] L.N.Lipatov, Gauge invariant effective action for high-energy processes in QCD, Nucl. Phys. B452, 369-400 (1995) [hep-ph/9502308].
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