Hard diffraction from parton rescattering in QCD
arXiv:hep-ph/0409119 · doi:10.1103/PhysRevD.71.074020
Abstract
We analyze the QCD dynamics of diffractive deep inelastic scattering. The presence of a rapidity gap between the target and diffractive system requires that the target remnant emerges in a color singlet state, which we show is made possible by the soft rescattering of the struck quark. This rescattering is described by the path-ordered exponential (Wilson line) in the expression for the parton distribution function of the target. The multiple scattering of the struck parton via instantaneous interactions in the target generates dominantly imaginary diffractive amplitudes, giving rise to an "effective pomeron" exchange. The pomeron is not an intrinsic part of the proton but a dynamical effect of the interaction. This picture also applies to diffraction in hadron-initiated processes. Due to the different color environment the rescattering is different in virtual photon- and hadron-induced processes, explaining the observed non-universality of diffractive parton distributions. This framework provides a theoretical basis for the phenomenologically successful Soft Color Interaction model which includes rescattering effects and thus generates a variety of final states with rapidity gaps. We discuss developments of the SCI model to account for the color coherence features of the underlying subprocesses.
12 pages, 9 figures, REVTeX4. Somewhat expanded and modified version, two new subsections added. To appear in PRD
References in corpus (22)
- Quantum Chromodynamics and Other Field Theories on the Light Cone
- Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering
- LEPTO 6.5 - A Monte Carlo Generator for Deep Inelastic Lepton-Nucleon Scattering
- Proof of Factorization for Diffractive Hard Scattering
- Inclusive Measurement of Diffractive Deep-inelastic ep Scattering
- Structure Functions are not Parton Probabilities
- Soft Colour Interactions as the Origin of Rapidity Gaps in DIS
- Diffractive Hard Scattering with a Coherent Pomeron
- Observation of Diffractive W Boson Production at the Tevatron
- Diffractive jet production in a simple model with applications to HERA
- Diffraction in Deep Inelastic Scattering
- The QCD description of diffractive processes
- Soft Color Interactions and Diffractive Hard Scattering at the Fermilab Tevatron
- Observation of hard scattering in photoproduction events with a large rapidity gap at HERA
- Hard Single Diffraction in pbarp Collisions at root-s = 630 and 1800 GeV
- A QCD analysis of diffractive deep-inelastic scattering data
- Measurement of the Q2 and energy dependence of diffractive interactions at HERA
- Observation of Diffractively Produced W and Z Bosons in pbar-p Collisions at root-s = 1800 GeV
- Diffraction and the Pomeron
- Observation of Diffractive Production at the Fermilab Tevatron
- Factorization is not violated
- Diffractive Higgs bosons and prompt photons at hadron colliders
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- Measurement of the Diffractive Deep-Inelastic Scattering Cross Section with a Leading Proton at HERA
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- Inclusive Measurement of Diffractive Deep-Inelastic Scattering at HERA
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- Heavy Quark Energy Loss Through Soft QCD Scattering in the QGP
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