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A<sc>bstract</sc> We explore the recently derived equation that resums DGLAP corrections to the JIMWLK Hamiltonian in the simplified setting of the SU(2) gauge theory. We solve the equation numerically for the scattering matrix of a dressed gluon for a particular initial condition, that corresponds to a dipole initial state. We evolve theS-matrix of a single dressed gluon from the scaleQ_P, which is the inverse color correlation length in the projectile toQ≫Q_Pwhich corresponds to the hard resolution scale provided by the target. As expected,Sceases to be unitary if evolved to significant ln$$ {Q}^2/{Q}_P^2 $$

Q^{2} / Q_{P}^{2}

. Our numerical results indicate an interesting universal (independent of the coupling constant) pattern for this deviation from unitarity.

Angular correlations in pA collisions from CGC: multiplicity and mean transverse momentum dependence of $$v_2$$

https://doi.org/10.1140/epjc/s10052-021-09373-5

Altinoluk, Tolga; Armesto, Néstor; Kovner, Alex; Lublinsky, Michael; Skokov, Vladimir V. (July 2021, The European Physical Journal C)

Abstract Within the dense-dilute Color Glass Condensate approach, and using the Golec–Biernat–Wuesthoff model for the dipole scattering amplitude, we calculate$$v_2^2$$

v_{2}^{2}

as well as the correlations between$$v_2^2$$

v_{2}^{2}

and both the total multiplicity and the mean transverse momentum of produced particles. We find that the correlations are generally very small consistent with the observations. We note an interesting sharp change in the value of$$v^2_2$$

v_{2}^{2}

as well as of its correlations as a function of the width of the transverse momentum bin. This crossover is associated with the change from Bose enhancement dominance of the correlation for narrow bin to HBT dominated correlations for larger bin width.

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