Beam-recoil polarization transfer in the nucleon resonance region in the exclusive e-vectorp{yields}e{sup '}K{sup +}{lambda}-vector and e-vectorp{yields}e{sup '}K{sup +}{sigma}-vector{sup 0} reactions at the CLAS spectrometer

Beam-recoil transferred polarizations for the exclusive e-vectorp{yields}e{sup '}K{sup +}{lambda}-vector,{sigma}-vector{sup 0} reactions have been measured using the Continuous Electron Beam Accelerator Facility's large acceptance spectrometer (CLAS) at the Thomas Jefferson National Accele...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 2009-06, Vol.79 (6)
Main Authors: Carman, D. S., Burkert, V. D., Deur, A., Girod, F. X., Kubarovsky, V., Sharabian, Y. G., Stepanyan, S., Wolin, E., Raue, B. A., Dhamija, S., Gabrielyan, M. Y., Gonenc, A., Moteabbed, M., Schott, D., Adhikari, K. P., Amaryan, M. J., Dodge, G. E., Mayer, M., Niroula, M. R., Seraydaryan, H.
Format: Article
Language:English
Subjects:
ACCELERATOR FACILITIES
CENTER-OF-MASS SYSTEM
COMPARATIVE EVALUATIONS
ELECTRON BEAMS
ELECTROPRODUCTION
GEV RANGE 01-10
KAONS PLUS
LAMBDA PARTICLES
MOMENTUM TRANSFER
PAIR PRODUCTION
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
POLARIZATION
QUARKS
REACTION KINETICS
S CHANNEL
SEMICLASSICAL APPROXIMATION
SIGMA NEUTRAL PARTICLES
SIGMA PARTICLES
SPECTROMETERS
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Summary:Beam-recoil transferred polarizations for the exclusive e-vectorp{yields}e{sup '}K{sup +}{lambda}-vector,{sigma}-vector{sup 0} reactions have been measured using the Continuous Electron Beam Accelerator Facility's large acceptance spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. New measurements have been completed at beam energies of 4.261 and 5.754 GeV that span a range of momentum transfer Q{sup 2} from 0.7 to 5.4 GeV{sup 2}, invariant energy W from 1.6 to 2.6 GeV, and the full center-of-mass angular range of the K{sup +} meson. These new data add to the existing CLAS K{sup +}{lambda} measurements at 2.567 GeV, and provide the first-ever data for the K{sup +}{sigma}{sup 0} channel in electroproduction. Comparisons of the data with several theoretical models are used to study the sensitivity to s-channel resonance contributions and the underlying reaction mechanism. Interpretations within two semiclassical partonic models are made to probe the underlying reaction mechanism and the ss quark-pair creation dynamics.
ISSN:0556-2813
1089-490X
DOI:10.1103/PHYSREVC.79.065205