The differential cross section, dσ/dt, for ω meson exclusive photoproduction on the proton above the resonance region (2.6<W<2.9 GeV) was measured up to a momentum transfer -t=5 GeV2 using the CLAS detector at Jefferson Laboratory. The ω channel was identified by detecting a proton and π+ in the final state and using the missing mass technique. While the low momentum transfer region shows the typical diffractive pattern expected from Pomeron and Reggeon exchange, at large -t the differential cross section has a flat behavior. This feature can be explained by introducing quark interchange processes in addition to the QCD-inspired two-gluon exchange.
Photoproduction of the ω Meson on the Proton at Large Momentum Transfer
TAIUTI, MAURO GINO;CORVISIERO, PIETRO;RICCO, GIOVANNI;
2003-01-01
Abstract
The differential cross section, dσ/dt, for ω meson exclusive photoproduction on the proton above the resonance region (2.6I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.