J/Psi and Psi' total cross sections and formation times from data for charmonium suppression in $pA$ collisions

Details J/Psi and Psi' total cross sections and formation times from data for charmonium suppression in $pA$ collisions J/Psi and Psi' total cross sections and formation times from data for charmonium suppression in $pA$ collisions

1999-08-04

arxiv.org/abs/hep-ph/9908243v2

Phys.Lett. B477 (2000) 93-98

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages of Latex including 2 figures; typos in the abstract are corrected

Scientific paper

10.1016/S0370-2693(00)00198-2

The recent data for E866 experiment on the x_F dependence for charmonium suppression in pA collisions at 800 GeV are analyzed using a time- and energy-dependent preformed charmonium absorption cross section \sigma_{abs}^\psi(\tau,\sqrt{s}). For \sqrt{s}=10 GeV the initially (\tau=0) produced premeson has an absorption cross section of \sigma_{pr}~3mb. At the same energy but for \tau -> \infty one deduces for the total cross sections \sigma_{tot}^{J/Psi N}=(2.8\pm 0.3)mb, \sigma_{tot}^{J/Psi N}= (10.5\pm 3.6)mb. The date are compatible with a formation time \tau_{1/2}=0.6 fm/c.

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