6533b82dfe1ef96bd12908b1
RESEARCH PRODUCT
Λ polarization in associated K+–Λ electro-production
Marc VanderhaeghenL. TeodorescuJoseph MitchellPaul GueyeJ.m. LagetO.k. BakerR. WilliamsM. GuidalG. NiculescuRolf EntT. Angelescusubject
Nuclear physicsPhysicsNuclear and High Energy PhysicsSpectrometerLagrangian modelHadronElectronPolarization (waves)description
Abstract The result of a feasibility study to measure the Λ polarization in associated K + – Λ electro-production is presented. This measurement was performed in the experimental Hall C at Jefferson Lab. The scattered electron was detected in the HMS spectrometer, and the electro-produced kaon and the proton from the Λ → pπ − decay were both detected in the SOS spectrometer. This quantity is very sensitive to the elementary p ( e , e ′ K ) Λ process and gives information on resonance production, and Regge exchange, among others. The result presented was measured at Q 2 =1.50 (GeV/c) 2 and cos θ Kγ CM =14°. The limits of the Λ polarization, with respect to the p γ × p K axis, were found to be −0.21 and +0.89 with a confidence level of 68%. The result is compared to theoretical predictions based on an effective hadronic field Lagrangian model and a Regge framework model.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-11-01 | Nuclear Physics A |