Speaker
Tolga Altinoluk
Description
We consider dijet production in deep inelastic scattering (DIS) at small $x$, focusing on contributions involving the quark background field of the target. We first derive the quark-gluon and quark-antiquark dijet cross sections in general kinematics at next-to-eikonal (NEik) accuracy in the high-energy limit. We then perform the expansion in the back-to-back limit at leading and next-to-leading power and write the resulting cross sections in terms of transverse-momentum-dependent parton distributions (TMDs). We identify contributions associated with twist-2 and twist-3 quark TMDs, including both kinematic-twist corrections and genuine three-body operator structures.