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 (16)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction
• Measurement of gamma p --> K+ Lambda and gamma p --> K+ Sigma0 at photon energies up to 2.6 GeV
• Evidence for the two pole structure of the Lambda(1405) resonance
• 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
• Lineshape of the Lambda(1405) Hyperon Measured Through its Sigma0 pion0 Decay
• Photoproduction of the Lambda(1405) on the proton and nuclei
• Nucleon and Delta resonances in K Sigma(1385) photoproduction from nucleons
• Negative-parity baryon spectra in quenched anisotropic lattice QCD
• The associated photoproduction of positive kaons and ${\pi }^0\Lambda$ or $\pi \Sigma$ pairs in the region of the $\Sigma$(1385) and $\Lambda$(1405) resonances
• Five-quark picture of Lambda(1405) in anisotropic lattice QCD
• Structure of Lambda(1405) and chiral dynamics
• A pentaquark model for Lambda(1405)

Cited by in corpus (61)

• Baryon spectroscopy
• Chiral SU(3) theory of antikaon-nucleon interactions with improved threshold constraints
• Exotic Hadrons from Heavy Ion Collisions
• Weak decays of heavy hadrons into dynamically generated resonances
• 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)
• Differential Photoproduction Cross Sections of the Sigma0(1385), Lambda(1405), and Lambda(1520)
• On the isospin 0 and 1 resonances from $\pi \Sigma$ photoproduction data
• Antikaon-nucleon interaction and Lambda(1405) in chiral SU(3) dynamics
• Lambda(1405) poles obtained from pi0-Sigma0 photoproduction data
• Predictions for the ${\Lambda }_b\to J/\psi \Lambda (1405)$ decay
• Weak decay of Lambda_c^+ for the study of Lambda(1405) and Lambda(1670)
• QCD and the Strange Baryon Spectrum
• A meson-baryon molecular interpretation for some ${\Omega }_c$ excited baryons
• Role of a triangle singularity in the $\gamma p\to K^{+}\Lambda (1405)$ reaction
• Structure of Lambda(1405) and construction of KbarN local potential based on chiral SU(3) dynamics
• Near-threshold Lambda(1520) production by the gamma p -> K+Lambda(1520) reaction at forward K+ angles
• Internal structure of resonant Lambda(1405) state in chiral dynamics
• Possible $\Sigma ({\frac{1}{2}}^{-})$ under the ${\Sigma }^{\ast }(1385)$ peak in $K{\Sigma }^{\ast }$ photoproduction
• Cross-channel constraints on resonant antikaon-nucleon scattering
• Strategy to find the two $\Lambda (1405)$ states from lattice QCD simulations
• Cross Sections and Beam Asymmetries for K+ Sigma*- photoproduction from the deuteron at 1.5-2.4 GeV
• Determination of exotic hadron structure by constituent-counting rule for hard exclusive processes
• First Observation of the $\Lambda (1405)$ Line Shape in Electroproduction
• The ${\Lambda }_b\to J/\psi K\Xi$ decay and the higher order chiral terms of the meson baryon interaction
• Photoproduction of $\Lambda (1405)$ with the $N^{\ast }$ and $t$-channel Regge contributions
• A coupled-channel analysis for phi-photoproduction with Lambda(1520)
• Antineutrino induced Lambda(1405) production off the proton
• Kaon induced Lambda(1405) production on a deuteron target at DAFNE
• Charged K* Photoproduction in a Regge model
• Structure of the $\Lambda (1405)$ and the $K^{-}d\to \pi \Sigma n$ reaction
• The $K^{-}p\to {\Sigma }^0{\pi }^0$ reaction at low energies in a chiral quark model
• The $\Sigma$(1385) photoproduciton from proton within a Regge-plus-resonance approach
• Production of hyperon resonances induced by kaon on a deuteron target
• Photoproduction of $K^{+}\Lambda (1405)\to K^{+}{\pi }^0{\Sigma }^0$ extending to forward angles and low momentum transfer
• The role of the triangle singularity in $\Lambda (1405)$ production in the ${\pi }^{-}p\to K^0\pi \Sigma$ and $pp\to p{K}^{+}\pi \Sigma$ processes
• Analysis of recent CLAS data on ${\Sigma }^{\ast }(1385)$ photoproduction off a neutron target
• ${\chi }_{c0}(1P)$ decay into $\bar{\Sigma }\Sigma \pi$ in search of an $I=1$, $1/2^{-}$ baryon state around $\bar{K}N$ threshold
• Pole position of $\Lambda (1405)$ measured in $d(K^{-},n)\pi \Sigma$ reactions
• Determination of compositeness of the Lambda(1405) resonance from its radiative decay
• Meson-baryon scattering up to the next-to-next-to-leading order in covariant baryon chiral perturbation theory
• Semileptonic ${\Lambda }_c$ decay to $\nu l^{+}$ and $\Lambda (1405)$
• Isospin Decomposition of the Photoproduced Σπ System Near the Λ(1405)
• Low energy reactions $K^{-}p\to {\Sigma }^0{\pi }^0$, $\Lambda {\pi }^0$, ${\bar{K}}^{0}n$ and the strangeness $S=-1$ hyperons
• 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
• First application of a microscopic $K^{-}NN$ absorption model in calculations of kaonic atoms
• Pole trajectories of the $\Lambda (1405)$ helps establish its dynamical nature
• Recent developments in antikaon-nucleon dynamics
• Baryon Resonances
• Photoproduction of $\gamma N\to K^{+}{\Sigma }^{\ast }(1385)$ in the Reggeized framework
• What We Know About the Lambda(1405)
• 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
• Hyperon Photo and Electro Production at CLAS
• Excited Hyperons Produced in Proton-Proton Collisions with Anke@COSY
• Antikaon-nucleon dynamics and its application to few-body systems
• The $\bar{K}N$ interaction in higher partial waves
• A new N* resonance as a hadronic molecular state
• Investigation of the $\bar{K}$--${}^6$Li Interaction and the Search for the $\Lambda (1405)$ Resonance
• Chiral dynamics and baryon resonances