Photoproduction of the ρ0 meson on the proton at large momentum transfer

CLAS Collaboration

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1 Scopus citations


The differential cross section, dσ/dt, for ρ0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer −t = 5GeV2 using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The ρ0 channel was extracted from the measured two charged-pion cross sections by fitting the π+π and pπ+ 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 ρ photoproduction.

Original languageEnglish (US)
Pages (from-to)172002-1-172002-5
JournalPhysical Review Letters
Issue number17
StatePublished - Oct 22 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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