Study of Nuclear Suppression at Large Forward Rapidities in d-Au Collisions at Relativistic and Ultrarelativistic Energies

TL;DR

This paper investigates the suppression of high-pT hadron production at large forward rapidities in d-Au collisions, showing that coherence effects are not responsible, thus challenging saturation-based models.

Contribution

The study provides model predictions using the light-cone dipole approach that align with experimental data and excludes saturation models as explanations for nuclear suppression.

Findings

Good agreement with BRAHMS and STAR data

Suppression predicted at lower energies without coherence effects

Excludes saturation and Color Glass Condensate models

Abstract

We study a strong suppression of the relative production rate (d-Au)/(p-p) for inclusive high-pT hadrons of different species at large forward rapidities (large Feynman xF). The model predictions calculated in the light-cone dipole approach are in a good agreement with the recent measurements by the BRAHMS and STAR Collaborations at the BNL Relativistic Heavy Ion Collider. We predict a similar suppression at large pT and large xF also at lower energies, where no effect of coherence is possible. It allows to exclude the saturation models or the models based on Color Glass Condensate from interpretation of nuclear effects.