Multiplicities for LHC Nuclear Collisions Using HERA Structure Functions

Details Multiplicities for LHC Nuclear Collisions Using HERA Structure Functions Multiplicities for LHC Nuclear Collisions Using HERA Structure Functions

1994-04-08

arxiv.org/abs/hep-ph/9404237v1

Phys.Lett. B332 (1994) 191-194

Physics

High Energy Physics

High Energy Physics - Phenomenology

HU-TFT-94-6, 7 pages, 3 PostScript figures included in the end of the tex-file

Scientific paper

10.1016/0370-2693(94)90878-8

We compute in QCD perturbation theory the transverse energy carried by gluons, quarks and antiquarks with $p_T\ge p_0\approx 2$ GeV in Pb+Pb collisions at $\sqrt{s}=5500$ $A$GeV by using structure functions compatible with the small-$x$ increase observed at HERA. This gives a perturbative estimate for the energy and entropy density of the bulk system at times $\tau\sim 0.1$ fm. The predicted initial gluon entropy density gives a lower limit of about 2200...3400 for the final charged multiplicity. Sources of further entropy increase are discussed.

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