Measurement of polarisation observables in $K_s^0{\Sigma }^{+}$ photoproduction off the proton

Abstract

The reaction $\gamma p\to K_S^0{\Sigma }^{+}$ is studied in the photon energy range from threshold. Linearly polarised photon beams from coherent bremsstrahlung enabled the first measurement of photon beam asymmetries in this reaction up to $E_{\gamma }=2250$ MeV. In addition, the recoil hyperon polarisation was determined through the asymmetry in the weak decay ${\Sigma }^{+}\to p{\pi }^0$ up to $E_{\gamma }=1650$ MeV. The data are compared to partial wave analyses, and the possible impact on the interpretation of a recently observed cusp-like structure near the $K^{\ast }$ thresholds is discussed.

arXiv comment6 pages, 5 figures. References [8,9,10,11] which were not on the original submission are now included

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Cited by in corpus (4)

• Light Baryon Spectroscopy
• Observation of a cusp-like structure in the $\gamma p\to K^{+}{\Sigma }^0$ cross section at forward angles and low momentum transfer
• Measurement of double polarisation asymmetries in $\omega$-photoproduction
• Strangeness photoproduction at extremely forward angles at the BGO-OD experiment