Evidence for color fluctuations in the nucleon in high-energy scattering

Abstract

We study quantum fluctuations of the nucleon's parton densities by combining QCD factorization for hard processes with the notion of cross section fluctuations in soft diffraction. The fluctuations of the small-x gluon density are related to the ratio of inelastic and elastic vector meson production in e-p scattering. A simple dynamical model explains the HERA data and predicts the x- and Q^2-dependence of the ratio. In p-p/pbar-p scattering, fluctuations enhance multiple hard processes (but cannot explain the Tevatron CDF data), and reduce gap survival in central exclusive diffraction.

4 pages, 3 figures

References in corpus (4)

• The Physics of Ultraperipheral Collisions at the LHC
• Generalized parton distributions and rapidity gap survival in exclusive diffractive pp scattering
• Double parton scattering, diffraction and effective cross section
• Survival probability for high mass diffraction

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• Gluon imaging using azimuthal correlations in diffractive scattering at the Electron-Ion Collider