Photoproduction of Lambda(1405) and Sigma^{0}(1385) on the proton at E_γ= 1.5-2.4 GeV

Abstract

Differential cross sections for $\gamma p\to K^{+}\Lambda (1405)$ and $\gamma p\to K^{+}{\Sigma }^0(1385)$ reactions have been measured in the photon energy range from 1.5 to 2.4 GeV and the angular range of $0.8<\cos (\Theta )<1.0$ for the $K^{+}$ scattering angle in the center-of-mass system. This data is the first measurement of the $\Lambda (1405)$ photoproduction cross section. The lineshapes of \LamS measured in ${\Sigma }^{+}{\pi }^{-}$ and ${\Sigma }^{-}{\pi }^{+}$ decay modes were different with each other, indicating a strong interference of the isospin 0 and 1 terms of the $\Sigma \pi$ scattering amplitudes. The ratios of \LamS production to \SigS production were measured in two photon energy ranges: near the production threshold ($1.5<E_{\gamma }<2.0$ GeV) and far from it ($2.0<E_{\gamma }<2.4$ GeV). The observed ratio decreased in the higher photon energy region, which may suggest different production mechanisms and internal structures for these hyperon resonances.

References in corpus (4)

• Lineshape of the Lambda(1405) Hyperon Measured Through its Sigma0 pion0 Decay
• Nucleon and Delta resonances in K Sigma(1385) photoproduction from nucleons
• Five-quark picture of Lambda(1405) in anisotropic lattice QCD
• A pentaquark model for Lambda(1405)

Cited by in corpus (22)

• Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)
• Comprehensive analysis of the wave function of a hadronic resonance and its compositeness
• New insights into antikaon-nucleon scattering and the structure of the Lambda(1405)
• Predictions for the ${\Lambda }_b\to J/\psi \Lambda (1405)$ decay
• QCD and the Strange Baryon Spectrum
• Role of a triangle singularity in the $\gamma p\to K^{+}\Lambda (1405)$ reaction
• Cross-channel constraints on resonant antikaon-nucleon scattering
• Cross Sections and Beam Asymmetries for K+ Sigma*- photoproduction from the deuteron at 1.5-2.4 GeV
• Antineutrino induced Lambda(1405) production off the proton
• Kaon induced Lambda(1405) production on a deuteron target at DAFNE
• Photoproduction of $K^{+}\Lambda (1405)\to K^{+}{\pi }^0{\Sigma }^0$ extending to forward angles and low momentum transfer
• Pole position of $\Lambda (1405)$ measured in $d(K^{-},n)\pi \Sigma$ reactions
• 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
• Pole trajectories of the $\Lambda (1405)$ helps establish its dynamical nature
• Recent developments in antikaon-nucleon dynamics
• First application of a microscopic $K^{-}NN$ absorption model in calculations of kaonic atoms
• Structure of $\Lambda$(1405) resonance and $\gamma p\to K^{+}+(\pi \Sigma {)}^0$ reaction
• Trace of $\Lambda (1405)$ resonance in low energy $K^{-}+{}^3\mathrm{He}\to ({\pi }^0{\Sigma }^0)+d$ reaction
• Excited Hyperons Produced in Proton-Proton Collisions with Anke@COSY
• The $\bar{K}N$ interaction in higher partial waves
• Investigation of the $\bar{K}$--${}^6$Li Interaction and the Search for the $\Lambda (1405)$ Resonance
• Chiral dynamics and baryon resonances