Hyperon Double Polarization Observables from CLAS for the p(e,e'K^+)Y Reaction

Details Hyperon Double Polarization Observables from CLAS for the p(e,e'K^+)Y Reaction Hyperon Double Polarization Observables from CLAS for the p(e,e'K^+)Y Reaction

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprc10011c&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

An extensive program of kaon electroproduction from the proton utilizing highly polarized electron beams is presently underway in Hall B at Jefferson Laboratory using the CLAS spectrometer. As part of experiment E99-006, the helicity-dependent components of the hyperon polarization from the reactions p(e,e'K^+)Λ and p(e,e'K^+)Σ^0 have been extracted. The data collected during the 1999 run period at beam energies of 2.6 and 4.2 GeV span a range of kinematics in W from threshold to 2.4 GeV and Q^2 from 0.8 to 3.0 (GeV/c)^2. Preliminary results of this hyperon-polarization analysis will be shown and interpreted within the light of available hadrodynamic phenomenological descriptions and newly developed gauge-invariant models based on t-channel Reggeon exchanges. The precision of our data has been demonstrated to be highly sensitive to different models of the production process. This will provide for insight into the structure of higher-mass s-channel resonances, as well as evidence in the search for the missing resonances predicted by quark models.

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