33rd International Workshop on Deep Inelastic Scattering and Related Subjects (DIS2026)

Next-to-leading power gluon TMDs from back-to-back DIS dijets at next-to-eikonal accuracy at low x

7 May 2026, 11:15

20m

Sala SATURNO A, First Floor (Hotel Carlton)

Talk WG2 Small-x, Diffraction and Vector Mesons WG2 Small-x, diffraction and vector mesons

Speakers

Kacper Goslawski (National Centre for Nuclear Research, Warsaw) jules Favrel (National Centre for Nuclear Reseach, Warsaw, PL)

Description

We consider dijet production in deep inelastic scattering at small x, on a purely gluonic unpolarized target. Starting from earlier results obtained at next-to-eikonal accuracy in the high-energy limit, we perform the expansion in the back-to-back dijet limit, at next-to-leading power (NLP) accuracy. We rewrite our results in the language of transverse-momentum-dependent (TMD) factorization, in terms of leading power and NLP TMD gluon distributions (gluon TMDs).
In particular, we focus on the contribution to the cross section of NLP gluon TMDs corresponding to correlators of three gluon field strength tensors. Their proper derivation from the low x formalism requires to go beyond the semi-classical approximation of the CGC, which amounts to keeping track of the ordering of fields as quantum operators.
This study allows us to improve our understanding of the interplay between the TMD and low x approaches, by including the first power corrections with respect to the back-to-back jets limit as well as with respect to the eikonal limit.

Presentation materials

Goslawski_Conference_Presentation.pdf