Transverse energy distributions and $J/ψ$ production in Pb+Pb collisions

Details Transverse energy distributions and $J/ψ$ production in Pb+Pb collisions Transverse energy distributions and $J/ψ$ production in Pb+Pb collisions

2001-02-05

arxiv.org/abs/hep-ph/0102038v2

Phys.Rev. C64 (2001) 054903

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version with better E_T fit. 4 pages, 2 figures

Scientific paper

10.1103/PhysRevC.64.054903

We have analyzed the latest NA50 data on transverse energy distributions and $J/\psi$ suppression in Pb+Pb collisions. The transverse energy distribution was analysed in the geometric model of AA collisions. In the geometric model, fluctuations in the number of NN collisions at fixed impact parameter are taken into account. Analysis suggests that in Pb+Pb collisions, individual NN collisions produces less $$, than in other AA collisions. The nucleons are more transparent in Pb+Pb collisions. The transverse energy dependence of the $J/\psi$ suppression was obtained following the model of Blaizot et al, where charmonium suppression is assumed to be 100% effective above a threshold density. With fluctuations in number of NN collisions taken into account, good fit to the data is obtained, with a single parameter, the threshold density.

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