Quark correlations in the Color Glass Condensate: Pauli blocking and the ridge

TL;DR

This paper explores quark-quark correlations in p-A collisions within the Color Glass Condensate framework, revealing a dip in the ridge due to Pauli blocking, which could be observed in charm quark correlations at the LHC.

Contribution

First analysis of quark correlations in p-A collisions using the Color Glass Condensate, highlighting initial state effects like Pauli blocking on the ridge structure.

Findings

Identification of a dip at  in the quark-quark ridge

Demonstration that initial state correlations survive scattering

Potential observability in charm quark correlations at LHC

Abstract

We consider, for the first time, correlations between produced quarks in p-A collisions in the framework of the Color Glass Condensate. We find a quark-quark ridge that shows a dip at $\Delta\eta\sim 2$ relative to the gluon-gluon ridge. The origin of this dip is the short range (in rapidity) Pauli blocking experienced by quarks in the wave function of the incoming projectile. We observe that these correlations, present in the initial state, survive the scattering process. We suggest that this effect may be observable in open charm-open charm correlations at the Large Hadron Collider.