Beam-Target Helicity Asymmetry $E$ in $K^0\Lambda$ and $K^0{\Sigma }^0$ Photoproduction on the Neutron

Abstract

We report the first measurements of the $E$ beam-target helicity asymmetry for the $\vec{\gamma }\vec{n}\to K^0\Lambda$, and $K^0{\Sigma }^0$ channels in the energy range 1.70$\le W\le$2.34 GeV. The CLAS system at Jefferson Lab uses a circularly polarized photon beam and a target consisting of longitudinally polarized solid molecular hydrogen deuteride with low background contamination for the measurements. The multivariate analysis method boosted decision trees was used to isolate the reactions of interest. Comparisons with predictions from the KaonMAID, SAID, and Bonn-Gatchina models are presented. These results will help separate the isospin $I=0$ and $I=1$ photo-coupling transition amplitudes in pseudoscalar meson photoproduction.

arXiv comment14 pages, 9 figures; Revised to match published version

References in corpus (30)

• Boosted Decision Trees as an Alternative to Artificial Neural Networks for Particle Identification
• Baryon spectroscopy
• Excited state baryon spectroscopy from lattice QCD
• Unified description of light- and strange-baryon spectra
• Differential Cross Sections for gamma + p --> K+ + Y for Lambda and Sigma0 Hyperons
• The light baryon spectrum in a relativistic quark model with instanton-induced quark forces I. The non-strange baryon spectrum and ground-states
• Evidence for a missing nucleon resonance in kaon photoproduction
• On baryon resonances and chiral symmetry
• Strange Decays of Nonstrange Baryons
• The Flavor Structure of the Excited Baryon Spectra from Lattice QCD
• Hyperon Photoproduction in the Nucleon Resonance Region
• Completeness Rules for Spin Observables in Pseudoscalar Meson Photoproduction
• Differential cross section and recoil polarization measurements for the gamma p to K+ Lambda reaction using CLAS at Jefferson Lab
• First Measurement of Beam-Recoil Observables Cx and Cz in Hyperon Photoproduction
• Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)
• Differential Photoproduction Cross Sections of the Sigma0(1385), Lambda(1405), and Lambda(1520)
• Determining pseudoscalar meson photo-production amplitudes from complete experiments
• Differential cross sections and recoil polarizations for the reaction gamma p -> K+ Sigma0
• Quasifree Kaon Photoproduction on Nuclei
• Hadron Spectroscopy and Structure from AdS/CFT
• Baryon resonances and polarization transfer in hyperon photoproduction
• Photoproduction of $\Lambda$ and ${\Sigma }^0$ hyperons using linearly polarized photons
• Spin and parity measurement of the Lambda(1405) baryon
• Pion- and photo-induced transition amplitudes to $\Lambda K$, $\Sigma K$, and $N\eta$
• Differential cross section of gamma n to K+ Sigma- on bound neutrons with incident photons from 1.1 to 3.6 GeV
• Measurement of the Differential and Total Cross Sections of the $\gamma d\to K^0\Lambda (p)$ Reaction within the Resonance Region
• Ambiguities in the partial-wave analysis of pseudoscalar-meson photoproduction
• $N^{\ast }$ resonances from $K\Lambda$ amplitudes in sliced bins in energy
• A cryostat to hold frozen-spin polarized HD targets in CLAS: HDice-II
• Model discrimination in pseudoscalar-meson photoproduction

Cited by in corpus (5)

• Light Baryon Spectroscopy
• Photoproduction Reactions and Non-Strange Baryon Spectroscopy
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• Coupled $K^{+}\Lambda$ and $K^0\Lambda$ photoproduction off the nucleon: Consequences from the recent CLAS and MAMI data and the $N(1680)P_{11}$ narrow state
• New narrow nucleon resonances $N^{\ast }(1685)$ and $N^{\ast }(1726)$ within the chiral quark-soliton model