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Spokesperson

M. Battaglieri

Abstract

The differential cross section, dsigma/dt, for rho0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer -t = 5 GeV2 using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The rho0 channel was extracted from the measured two charged-pion cross sections 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 r photoproduction.

Publication

1. M. Battaglieri, E. Anciant, M. Anghinolfi, R. De Vita, E. Golovach, J. M. Laget, V. Mokeev, M. Ripani, and CLAS Collaboration Photoproduction of the Rho0 Meson on the Proton at Large Momentum Transfer // Phys.Rev.Let.87,172002(2001)

Quantities

dσ/dt

Measurements