Effect of non-eikonal corrections on azimuthal asymmetries in the Color Glass Condensate

Abstract

We analyse the azimuthal structure of two gluon correlations in the Color Glass Condensate including those effects that result from relaxing the shockwave approximation for the target. Working in the Glasma graph approach suitable for collisions between dilute systems, we compute numerically the azimuthal distributions and show that both even and odd harmonics appear. We study their dependence on model parameters, energy of the collision, pseudorapidity and transverse momentum of the produced particles, and length of the target. While the contribution from non-eikonal corrections vanishes with increasing collision energy and becomes negligible at the energies of the Large Hadron Collider, it is found to be sizeable up to top energies at the Relativistic Heavy Ion Collider.

Latex, 18 pages, 7 figures; v2: 19 pages, 7 figures, some comments added and one figure modified, references updated, results and conclusions unchanged, final version

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• Single Inclusive Hadron Production in DIS at Small $x$: Next to Leading Order Corrections
• Gluon-mediated inclusive Deep Inelastic Scattering from Regge to Bjorken kinematics
• Particle correlations from the initial state
• Multiparticle production in proton-nucleus collisions beyond eikonal accuracy
• Multi-particle production in proton-nucleus collisions in the Color Glass Condensate
• Finite width effects on the azimuthal asymmetry in proton-nucleus collisions in the Color Glass Condensate
• Angular correlations in pA collisions from CGC: multiplicity and mean transverse momentum dependence of $v_2$
• Unifying approaches: derivation of Balitsky hierarchy from the Lipatov effective action
• Quark TMDs from back-to-back dijet production at forward rapidities in pA collisions beyond eikonal accuracy in the CGC
• Color Glass Condensate meets High Twist Expansion
• Parton model contributions as next-to-eikonal corrections to the dipole factorization of DIS and SIDIS at low $x_{Bj}$
• Anisotropic flow and the valence quark skeleton of hadrons