Photoproduction of the omega meson on the proton at large momentum transfer - INSPIRE

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

CLAS

Collaboration

Oct, 2002

5 pages

Published in:

Phys.Rev.Lett. 90 (2003) 022002

e-Print:

hep-ex/0210023 [hep-ex]

DOI:

10.1103/PhysRevLett.90.022002

Report number:

JLAB-PHY-03-04

Experiments:

JLAB-E-89-004

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Abstract:

The differential cross section,

d\sigma/dt

for

\omega

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

GeV

^2

using the CLAS detector at Jefferson Laboratory. The

\omega

channel was identified by detecting a proton and

\pi^+

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.

photon p: inelastic scattering
photon p: tagged beam
omega(783): photoproduction
omega(783): hadronic decay
mass spectrum: missing-mass
differential cross section: momentum transfer
Regge poles
pomeron: exchange
quark: exchange
exchange: two-gluon

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Figures(0)

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