DRAFT: Photoproduction of the ${\rho }^0$ meson on the proton at large momentum transfer

Abstract

The differential cross section, $d\sigma /dt$, for ${\rho }^0$ meson photoproduction on the proton above the resonance region ($2.6<W<2.9$ GeV) was measured up to a momentum transfer $-t=5$ GeV${}^2$ using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The ${\rho }^0$ channel was extracted from the measured two charged-pion cross section by fitting the ${\pi }^{+}{\pi }^{-}$ and $p{\pi }^{+}$ invariant masses. The low momentum transfer region shows the typical diffractive pattern expected from Reggeon-exchange. The flatter behavior at large -t cannot be explained solely in terms of QCD-inspired two-gluon exchange models. The data indicate that other processes, like quark interchange, are important to fully describe $\rho$ photoproduction.

arXiv commentsubmitted to PRL, 5pages, 4 figures

References in corpus (8)

• Photoproduction of vector mesons off nucleons near threshold
• Photoproduction of Vector Mesons at Large Transfer
• Photoproduction of phi(1020) mesons on the proton at large momentum transfer
• Measurement of diffractive photoproduction of vector mesons at large momentum transfer at HERA
• Addendum to "A Phenomenological Description of pi- Delta++ photoproduction and electroproduction in nucleon resonance region"
• A Phenomenological Description of (π^{-}Δ^{++}) Photo- and Electroproduction in Nucleon Resonance Region
• Large momentum transfer electroproduction of mesons
• A Consistent Next-to-Leading-Order QCD Calculation of Hadronic Diffractive Scattering

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• Locality of quark-hadron duality and deviations from quark counting rules above resonance region
• Unitary constraints on Deeply Virtual Compton Scattering
• Exclusive Meson Photo- and Electro-production, a Window on the Structure of Hadronic Matter
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• Pseudoscalar and Scalar Meson Photoproduction Interpreted by Regge Phenomenology
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