About Geometric Scaling and Small-x Evolution at RHIC and LHC

TL;DR

This paper demonstrates that RHIC data for hadron production in d-Au collisions aligns with geometric scaling, and highlights the importance of large p_t range to observe small-x evolution effects at LHC.

Contribution

It shows compatibility of RHIC data with geometric scaling and emphasizes the need for extended kinematic range to detect small-x evolution.

Findings

RHIC data compatible with geometric scaling

Large p_t fall-off sensitive to small-x evolution

Extended kinematic range needed for evolution detection

Abstract

We show that the whole range of RHIC data for hadron production in d-Au collisions is compatible with geometric scaling. To establish the scaling violations expected from small-x evolution a larger kinematic range in transverse momentum and rapidity would be needed. We point out that the fall-off of the p_t distribution of produced hadrons at large p_t is a sensitive probe of small-x evolution especially at the LHC.