Differential cross section and photon beam asymmetry for the gamma n -> K+ Sigma- reaction at Egamma=1.5-2.4 GeV

Abstract

Differential cross sections and photon beam asymmetries have been measured for the gamma n -> K+ Sigma- and gamma p -> K+ Sigma0 reactions separately using liquid deuterium and hydrogen targets with incident linearly polarized photon beams of Egamma=1.5-2.4 GeV at 0.6<cosTheta<1. The cross section ratio of sigma(K+Sigma-)/sigma(K+Sigma0), expected to be 2 on the basis of the isospin 1/2 exchange, is found to be close to 1. For the K+Sigma- reaction, large positive asymmetries are observed indicating the dominance of the K*-exchange. A large difference between the asymmetries for the K+Sigma- and K+Sigma0 reactions can not be explained by simple theoretical considerations.

5 pages, 3 figures, accepted by Phys. Rev. Lett

References in corpus (10)

• Differential Cross Sections for gamma + p --> K+ + Y for Lambda and Sigma0 Hyperons
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• Strange Decays of Nonstrange Baryons
• Hyperon Photoproduction in the Nucleon Resonance Region
• The gamma + p to K+ + Lambda and gamma + p to K+ + Sigma0 reactions at forward angles with photon energies from 1.5 to 2.4 GeV
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• Measurement of the reaction gamma p --> K0 Sigma+ at photon energies up to 2.6 GeV
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• Interaction effects in ${\mathbf{K}}^{+}$ photoproduction on the deuteron

Cited by in corpus (31)

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• Differential cross sections and recoil polarizations for the reaction gamma p -> K+ Sigma0
• Separated Structure Functions for the Exclusive Electroproduction of $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Final States
• Light Baryon Spectroscopy
• Near-threshold Lambda(1520) production by the gamma p -> K+Lambda(1520) reaction at forward K+ angles
• Photoproduction Reactions and Non-Strange Baryon Spectroscopy
• Light baryon resonances from a coupled-channel study including $\mathbf{K\Sigma }$ photoproduction
• Forward coherent $\varphi$-meson photoproduction from deuterons near threshold
• Differential cross section of gamma n to K+ Sigma- on bound neutrons with incident photons from 1.1 to 3.6 GeV
• Cross Sections and Beam Asymmetries for K+ Sigma*- photoproduction from the deuteron at 1.5-2.4 GeV
• Coupled-channel analysis of $K\Sigma$ production on the nucleon up to 2.0 GeV
• Electromagnetic production of $K\Sigma$ on the nucleon near threshold
• Measurement of the g p -> K^0 Sigma^+ reaction with the Crystal Ball/TAPS detectors at the Mainz Microtron
• Photoproduction of $\Lambda$ and ${\Sigma }^0$ hyperons off protons with linearly polarized photons at $E_{\gamma }=1.5-3.0$ GeV
• Photo-production of neutral kaons on 12C in the threshold region
• Positivity Constraints on Spin Observables in Exclusive Pseudoscalar Meson Photoproduction
• Induced polarization of Λ(1116) in kaon electroproduction
• Distillation of hydrogen isotopes for polarized HD target
• Extracting the pole and Breit-Wigner properties of nucleon and $\Delta$ resonances from the $\gamma N\to K\Sigma$ photoproduction
• Regge-plus-resonance predictions for kaon photoproduction from the neutron
• Model selection for $K^{+}{\Sigma }^{-}$ photoproduction within isobar model
• Differential cross section and photon beam asymmetry for the gamma p -> pi+ n reaction at forward pi+ angles at Egamma=1.5-2.95 GeV
• Quasifree Lambda, Sigma^0, and Sigma^- electroproduction from 1,2H, 3,4He, and carbon
• Magnetic interaction induced by the anomaly in kaon-photoproductions
• Progress and Issues in the Electromagnetic Production of Kaon on the Nucleon
• Differential cross section and photon-beam asymmetry for the gamma p -> pi- Delta++(1232) reaction at forward pi- angles for Egamma=1.5-2.95 GeV
• Measurement of the Photon Beam Asymmetry in $\vec{\gamma }p\to K^{+}{\Sigma }^0$ at $E_{\gamma }=8.5$ GeV
• Kaon photoproduction from the deuteron in a Regge-plus-resonance approach
• Combined analysis of the $\gamma n\to K^0{\Sigma }^0$ and $\gamma n\to K^{+}{\Sigma }^{-}$ reactions
• Strangeness Photoproduction on Quasifree Neutrons
• Monitoring the build-up of hydrogen polarization for polarized Hydrogen-Deuteride (HD) targets with NMR at 17 Tesla