Positivity Constraints on Spin Observables in Exclusive Pseudoscalar Meson Photoproduction

Abstract

Positivity constraints have proved to be important for spin observables of exclusive reactions involving polarized initial and final particles. Attention is focused in this note on the photoproduction of pseudoscalar mesons from spin 1/2 baryons, more specifically gamma+ N -> K+ Lambda, gamma+ N -> K Sigma, for which new experimental data are becoming available.

3 pages,RevTex, 1 figure, more details on the derivation, refs. added, to appear in Phys. Rev. C

References in corpus (5)

• Differential Cross Sections for gamma + p --> K+ + Y for Lambda and Sigma0 Hyperons
• Hyperon Photoproduction in the Nucleon Resonance Region
• Completeness Rules for Spin Observables in Pseudoscalar Meson Photoproduction
• Differential cross section and photon beam asymmetry for the gamma n -> K+ Sigma- reaction at Egamma=1.5-2.4 GeV
• Positivity constraints on initial spin observables in inclusive reactions

Cited by in corpus (11)

• First Measurement of Beam-Recoil Observables Cx and Cz in Hyperon Photoproduction
• Determining pseudoscalar meson photo-production amplitudes from complete experiments
• Measurement of beam-recoil observables Ox, Oz and target asymmetry for the reaction gamma p -> K Lambda
• Pion- and photo-induced transition amplitudes to $\Lambda K$, $\Sigma K$, and $N\eta$
• Lambda(1520) photoproduciton off the proton target with Regge contributions
• Information Content of Polarization Measurements
• Evidence for a spin-quartet of nucleon resonances at 2\,GeV
• Polarization in Hyperon Photo- and Electro- Production
• Gerasimov-Drell-Hearn Sum Rule and the Discrepancy between the New CLAS and SAPHIR Data
• On the spin-observables in pseudoscalar meson photoproduction
• Model-independent constraints on spin observables