JLab APS Centennial Presentations | |||||
Electroproduction of ømega(783) Mesons Using CLAS at Jefferson Lab. Session OB12 - Photoproduction and Electroproduction of Mesons. ORAL session, Wednesday morning, March 24 Room 219E, GWCC A. Coleman, H. Funsten (College of William and Mary, for the CLAS COLLABORATION)
Electroproduction of ømega(783) mesons from a proton target has been
measured
in a search for so called "missing baryon resonances". A 4 GeV
electron beam was used. The scattered electrons
were measured in coincidence with the recoiling proton and the \pi^+
from the ømega decay. Missing mass techniques were applied to identify
the ømega in the final state, and to reduce the \rho (770)
contribution.
The data show the ømega very clearly on a smooth background
originating
predominantly from 3-pion phase space. Differential cross sections
have been extracted, and the W and t dependencies will be presented.
The t dependence is mostly monotonic for W > 2 GeV, as expected from
pi-exchange and diffractive processes, while for W < 2 GeV strongly
non-monotonic behavior is observed, indicative of possible s-channel
nucleon resonance contributions (Work supported in part by the
NSF under grant PHY-9704502.).
|