Parton shower algorithm with saturation effect

Abstract

We extend the previously developed small $x$ parton shower algorithm to include the kinematic constraint effect and $k_t$ resummation effect. This work enables the Monte Carlo generator to simultaneously resum large $k_t$ and small $x$ logarithms in the saturation regime for the first time. It is an important step towards simulating processes involving multiple well separated hard scales, such as di-jet production in eA collisions at EIC.

Comments: 12 pages, 4 figures. arXiv admin note: text overlap with arXiv:2211.07174