Hadron multiplicities, pT-spectra and net-baryon number in central Pb+Pb collisions at the LHC

Details Hadron multiplicities, pT-spectra and net-baryon number in central Pb+Pb collisions at the LHC Hadron multiplicities, pT-spectra and net-baryon number in central Pb+Pb collisions at the LHC

2007-05-12

arxiv.org/abs/0705.1770v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

2 pages, 2 figures, to be presented at the workshop "Heavy Ion Collisions at the LHC: Last Call for Predictions" at CERN 29 Ma

Scientific paper

We compute the initial energy density and net baryon number density in 5% most central Pb+Pb collisions at $\sqrt s=5.5$ TeV from pQCD + (final state) saturation, and describe the evolution of the produced system with boost-invariant transversely expanding hydrodynamics. In addition to the total multiplicity at midrapidity, we give predictions for the multiplicity of charged hadrons, pions, kaons and (anti)protons, for the total transverse energy and net-baryon number, as well as for the $p_T$-spectrum of charged hadrons, pions and kaons. We also predict the region of applicability of hydrodynamics by comparing these results with high-$p_T$ hadron spectra computed from pQCD and energy losses.

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