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

Abstract

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 σ_{abs}^ψ(τ,\sqrt{s}). For \sqrt{s}=10 GeV the initially (τ=0) produced premeson has an absorption cross section of σ_{pr}~3mb. At the same energy but for τ-> \infty one deduces for the total cross sections σ_{tot}^{J/Psi N}=(2.8\pm 0.3)mb, σ_{tot}^{J/Psi N}= (10.5\pm 3.6)mb. The date are compatible with a formation time τ_{1/2}=0.6 fm/c.

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

References in corpus (2)

• Nonperturbative Effects in Gluon Radiation and Photoproduction of Quark Pairs
• Charmonium suppression in p-A collisions

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• Gluon Shadowing in DIS off Nuclei
• The effect of gluon depletion on J/psi suppression in pA and AA collisions
• Charmonium suppression by gluon bremsstrahlung in p-A and A-B collisions
• Charmonium production in relativistic proton-nucleus collisions : What will we learn from the negative x_F region ?
• Phenomenological Evidence for Gluon Depletion in pA Collisions
• Threshold $J/\psi -$ production in nucleon-nucleon collisions
• x_F-dependence of J/Psi suppression in pA collisions
• Absorption of $\psi (2S)$ mesons in nuclei
• Pre-resonant Charmonium-Nucleon Cross Section in the Model of the Stochastic Vacuum
• $\Psi (2s)$ production in $p+A$ collisions