Geometric scaling at BNL RHIC and CERN LHC
Abstract
We present a new phenomenological model of the dipole scattering amplitude to demonstrate that the RHIC data for hadron production in dAu collisions for all available rapidities are compatible with geometric scaling, just like the smallx inclusive deep inelastic scattering data. A detailed comparison with earlier geometric scaling violating models of the dipole scattering amplitude in terms of an anomalous dimension γ is made. In order to establish whether the geometric scaling violations expected from smallx evolution equations are present in the data a much larger range in transverse momentum and rapidity must be probed. Predictions for hadron production in pPb and pp collisions at LHC are given. We point out that the falloff of the transverse momentum distribution at LHC is a sensitive probe of the variation of γ in a region where x is much smaller than at RHIC. In this way, the expectation for the rise of γ from smallx evolution can be tested.
 Publication:

Physical Review D
 Pub Date:
 March 2008
 DOI:
 10.1103/PhysRevD.77.054014
 arXiv:
 arXiv:0711.4312
 Bibcode:
 2008PhRvD..77e4014B
 Keywords:

 12.38.t;
 13.60.Hb;
 13.85.Ni;
 Quantum chromodynamics;
 Total and inclusive cross sections;
 Inclusive production with identified hadrons;
 High Energy Physics  Phenomenology
 EPrint:
 11 pages, 6 figures, minor changes, references added