Particle Multiplicities in Nuclear Collisions at the LHC from Saturation Physics

Details Particle Multiplicities in Nuclear Collisions at the LHC from Saturation Physics Particle Multiplicities in Nuclear Collisions at the LHC from Saturation Physics

2008-06-04

arxiv.org/abs/0806.0672v1

J.Phys.G35:125110,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages and 2 figures. To appear in the proceedings of Quark Matter 2008: 20th International Conference On Ultra-relativistic

Scientific paper

10.1088/0954-3899/35/12/125110

The inclusion of running coupling effects in the BK-JIMWLK evolution equations considerably reduces the energy dependence of the saturation scale with respect to previous estimates based on fits to HERA data. We discuss how such slowdown affects the expectations for particle multiplicities in Pb-Pb collisions at LHC energies. Our prediction is based on the use of k_t-factorization and on the use of unintegrated gluon distributions taken from the numerical solutions of the BK equation with running coupling. We obtain a central value dN/d\eta(sqrt{s}=5.5 TeV)(\eta=0)~1390.

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