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Nuclear Transparency in Exclusive r 0 Production at HERMES. W. Lorenzon (Michigan) Collaboration. Introduction Diffractive r 0 production Nuclear Effects b N (Q 2 ) variation ( g shrinkage) coherent/incoherent cross section ratios l c -dependence

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Nuclear Transparency in Exclusive r0 Production at HERMES

W. Lorenzon (Michigan)

Collaboration

  • Introduction

    • Diffractive r0 production

  • Nuclear Effects

    • bN(Q2) variation (g shrinkage)

    • coherent/incoherent cross section ratios

    • lc-dependence

    • Q2-dependence (Color Transparency)

  • Summary


HERMES Experiment

at HERA (2003)



Exclusive Diffractive r0 Electroproduction







Color Transparency in A(m,m’r0) – FNAL Results


Color Transparency in A(p,di-jet) – FNAL Results



Color Transparency and r0 Leptoproduction





bN (Q2) –“Photon Shrinkage”


Q2 dependence of scoh / sincoh








A and Q2 dependence of scoh / sincoh


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