Jan 10 – 15, 2021
Weizmann Institute of Science
Asia/Jerusalem timezone
See you at IS2023 in Copenhagen in June 2023

A novel formulation of the unintegrated gluon distribution for DIS

Jan 13, 2021, 7:45 PM
1h 30m
Patio (vDLCC)



bullet talk (poster) New theoretical techniques at large and small coupling Poster


Dr Yacine Mehtar-Tani (Brookhaven National Laboratory)


Understanding the relation between QCD evolution in the Bjorken limit and the Regge limit is crucial to achieve a complete and smooth picture of proton and nuclear structure. The hope in the small x regime, where gluon density is expected to reach saturation and the naif partonic picture is expected to break down, was that by computing higher-order corrections to small x evolution (BK equations) one would capture more and more of the physics at moderate x. However, this research program has encountered some challenges. At NLO large collinear logarithms are present and need to be resummed spoiling the renormalization group structure established at LO.

In order to overcome these formal difficulties, we propose to revisit the shock wave approach for high energy scattering by proposing a new gauge invariant operator definition of hadronic operators that account systematically for the collinear limit of structure functions. I will discuss in particular inclusive DIS as a first application.

Primary author

Dr Yacine Mehtar-Tani (Brookhaven National Laboratory)

Presentation materials