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

Journal Article · Mon Jun 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.065205· OSTI ID:21293756

Carman, D S; Burkert, V D; Deur, A; Girod, F X; Kubarovsky, V; Sharabian, Y G; Stepanyan, S; Wolin, E ^[1]; Raue, B A; Dhamija, S; Gabrielyan, M Y; Gonenc, A; Moteabbed, M; Schott, D ^[2]; Adhikari, K P; Amaryan, M J; Dodge, G E; Mayer, M; Niroula, M R; Seraydaryan, H ^[3]

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1. Thomas Jefferson National Accelerator Laboratory, Newport News, Virginia 23606 (United States)
2. Florida International University, Miami, Florida 33199 (United States)
3. Old Dominion University, Norfolk, Virginia 23529 (United States)

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.

• OSTI ID: 21293756
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 79, Issue 6; Other Information: DOI: 10.1103/PhysRevC.79.065205; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATOR FACILITIES
CENTER-OF-MASS SYSTEM
COMPARATIVE EVALUATIONS
ELECTRON BEAMS
ELECTROPRODUCTION
GEV RANGE 01-10
KAONS PLUS
LAMBDA PARTICLES
MOMENTUM TRANSFER
PAIR PRODUCTION
POLARIZATION
QUARKS
REACTION KINETICS
S CHANNEL
SEMICLASSICAL APPROXIMATION
SIGMA NEUTRAL PARTICLES
SIGMA PARTICLES
SPECTROMETERS