Gluon spectrum in the glasma from JIMWLK evolution

Details Gluon spectrum in the glasma from JIMWLK evolution Gluon spectrum in the glasma from JIMWLK evolution

2011-05-27

arxiv.org/abs/1105.5511v2

Phys.Lett.B703:325-330,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 8 figures, RevTeX. V2: typo corrections, corrected fig 1. Published in PLB

Scientific paper

10.1016/j.physletb.2011.08.011

The JIMWLK equation with a "daughter dipole" running coupling is solved numerically starting from an initial condition given by the McLerran-Venugopalan model. The resulting Wilson line configurations are then used to compute the spectrum of gluons comprising the glasma inital state of a high energy heavy ion collision. The development of a geometrical scaling region makes the spectrum of produced gluons harder. Thus the ratio of the mean gluon transverse momentum to the saturation scale grows with energy. Also the total gluon multiplicity increases with energy slightly faster than the saturation scale squared.

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