Particle multiplicities in Lead-Lead collisions at the LHC from non-linear evolution with running coupling

Details Particle multiplicities in Lead-Lead collisions at the LHC from non-linear evolution with running coupling Particle multiplicities in Lead-Lead collisions at the LHC from non-linear evolution with running coupling

2007-07-17

arxiv.org/abs/0707.2545v3

Phys.Rev.Lett.99:262301,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version accepted for publication by Phys. Rev. Lett. Typos corrected, one figure removed and references updated

Scientific paper

10.1103/PhysRevLett.99.262301

We present predictions for the pseudo-rapidity density of charged particles produced in central Pb-Pb collisions at the LHC. Particle production in such collisions is calculated in the framework of k_t-factorization. The nuclear unintegrated gluon distributions at LHC energies are determined from numerical solutions of the Balitsky-Kovchegov equation including recently calculated running coupling corrections. The initial conditions for the evolution are fixed by fitting RHIC data at collision energies \sqrt{s}}=130 and 200 GeV per nucleon. We obtain dN^{Pb-Pb}_{ch}/d\eta (\sqrt{s}=5.5 TeV, \eta=0)\approx 1290\div 1480.

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