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

Study of the Nc dependence of TMD’s initial condition for JIMWLK evolution

6 May 2026, 15:30

20m

Sala SATURNO A, First Floor (Hotel Carlton)

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

Speaker

Florian Cougoulic (Jagiellonian University)

Description

To evaluate the high-energy dependence of the dipole or transverse momentum distributions (TMDs) within the color glass condensate framework, one relies on evolution equations such as the JIMWLK equation, or its large-Nc limit the BK equation.
It has been observed that the discrepancy between solutions for the dipole from the BK equation and the JIMWLK equation is less than expected from Nc-power counting. To study this puzzling observation, we evaluate the Nc-dependence of initial condition for TMDs, in addition to the dipole, which are generated stochastically according to the MV-model for SU(Nc) with Nc = 2,3,4,5. We identify scaling properties of those distributions analytically and numerically and identify which TMDs could be used as tools to solve this puzzle.

Presentation materials

IC-Nc-dep.pdf