On the Dihadron Angular Correlations in Forward $pA$ collisions

Understand

Dihadron angular correlations in forward $pA$ collisions have been considered as one of the most sensitive observables to the gluon saturation effects.

• In general, both parton shower effects and saturation effects are responsible for the back-to-back dihadron angular de-correlations.
• With the recent progress in the saturation formalism, we can incorporate the parton shower effect by adding the corresponding Sudakov factor in the saturation framework.
• In this paper, we carry out the first detailed numerical study in this regard, and find a very good agreement with previous RHIC $pp$ and $dAu$ data.