Geometric Scaling at RHIC and LHC

TL;DR

This paper shows that RHIC data supports geometric scaling in d-Au collisions and suggests that the transverse momentum distribution at LHC can reveal small-x evolution effects.

Contribution

It demonstrates geometric scaling in RHIC data and proposes using LHC transverse momentum distributions to detect small-x evolution effects.

Findings

RHIC data compatible with geometric scaling

Transverse momentum fall-off sensitive to small-x evolution

LHC data can probe small-x dynamics

Abstract

We demonstrate that the RHIC data for hadron production in d-Au collisions for all available rapidities are compatible with geometric scaling. In order to establish the presence of scaling violations expected from small-x evolution a much larger range in transverse momentum and rapidity needs to be probed. We show that the fall-off of the transverse momentum distribution of produced hadrons at LHC is a sensitive probe of small-x evolution.