Speaker
Description
We propose a novel way to study the Weizsäcker-Williams gluon distribution
using the Electron Ion Collider. We examine the interplay between the effect
of the soft gluon emissions, or Sudakov effects, and gluon saturation effects
with the help of the azimuthal correlations between the total transverse
momentum of the dijet system and the scattered electron. Kinematic cuts are
imposed such that the dijet system is produced in the forward direction of the
laboratory frame, which sets an upper bound on the probed longitudinal
fractions of the hadron momentum carried by scattered gluons. Further cuts are
chosen such that they allow us to use the factorization formalism that directly
involves the unpolarized Weizsäcker-Williams gluon distribution. We find that
this observable is very sensitive to the soft gluon emission and moderately
sensitive to the gluon saturation. The former sensitivity is, however, greatly
reduced in the nuclear modification ratio when comparing proton and heavy ions
as targets, opening the possibility to disentangle Sudakov effects and
saturation effects.
