Incoherent diffractive J/Psi-production in high energy nuclear DIS

Abstract

We compute cross sections for incoherent diffractive J/Psi production in lepton-nucleus deep inelastic scattering. The cross section is proportional to A in the dilute limit and to A^(1/3) in the black disc limit, with a large nuclear suppression due to saturation effects. The t-dependence of the cross section, if it can be measured accurately enough, is sensitive to the impact parameter profile of the gluons in the nucleus and their fluctuations, a quantity that determines the initial conditions of a relativistic heavy ion collision. The nuclear suppression in incoherent diffraction shows how the transverse spatial distribution of the gluons in the nucleus gradually becomes smoother at high energy. Since the values of the momentum transfer |t| involved are relatively large, this process should be easier to measure in future nuclear DIS experiments than coherent diffraction.

9 pages, 9 figures, RevTeX. V2: Title changed. Several new figures. Additions and clarifications in the text. To be published in Phys. Rev. C. V3: Typos in eq. (13) and text fixed. One new reference. Published in Phys. Rev. C

References in corpus (10)

• Glauber Modeling in High Energy Nuclear Collisions
• Collision geometry fluctuations and triangular flow in heavy-ion collisions
• Impact parameter dependent colour glass condensate dipole model
• Saturation QCD predictions with heavy quarks at HERA
• Nuclear enhancement and suppression of diffractive structure functions at high energies
• Exclusive vector meson production at HERA from QCD with saturation
• A unified description of diffractive deep inelastic scattering with saturation
• Exclusive vector meson production in electron-ion collisions
• Color Transparency at COMPASS energies
• Coherent and incoherent diffractive hadron production in pA collisions and gluon saturation

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