Physics Letters B (Nov 2014)

Measurement of polarisation observables in Ks0Σ+ photoproduction off the proton

  • R. Ewald,
  • A.V. Anisovich,
  • B. Bantes,
  • O. Bartholomy,
  • D. Bayadilov,
  • R. Beck,
  • Y.A. Beloglazov,
  • K.-T. Brinkmann,
  • V. Crede,
  • H. Dutz,
  • D. Elsner,
  • K. Fornet-Ponse,
  • F. Frommberger,
  • Ch. Funke,
  • A.B. Gridnev,
  • E. Gutz,
  • J. Hannappel,
  • W. Hillert,
  • P. Hoffmeister,
  • I. Jaegle,
  • O. Jahn,
  • T.C. Jude,
  • J. Junkersfeld,
  • H. Kalinowsky,
  • S. Kammer,
  • V. Kleber,
  • Frank Klein,
  • Friedrich Klein,
  • E. Klempt,
  • B. Krusche,
  • M. Lang,
  • H. Löhner,
  • I.V. Lopatin,
  • D. Menze,
  • T. Mertens,
  • J.G. Messchendorp,
  • V. Metag,
  • M. Nanova,
  • V.A. Nikonov,
  • D. Novinski,
  • R. Novotny,
  • M. Ostrick,
  • L. Pant,
  • H. van Pee,
  • A. Roy,
  • A.V. Sarantsev,
  • S. Schadmand,
  • C. Schmidt,
  • H. Schmieden,
  • B. Schoch,
  • S. Shende,
  • V. Sokhoyan,
  • A. Süle,
  • V.V. Sumachev,
  • T. Szczepanek,
  • U. Thoma,
  • D. Trnka,
  • R. Varma,
  • D. Walther,
  • Ch. Wendel

Journal volume & issue
Vol. 738
pp. 268 – 273

Abstract

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The reaction γp→KS0Σ+ 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 Eγ=1650MeV. In addition, the recoil hyperon polarisation was determined through the asymmetry in the weak decay Σ+→pπ0 up to Eγ=2250MeV. The data are compared to partial wave analyses, and the possible impact on the interpretation of a recently observed prominent structure in the cross section near the K⁎ thresholds is discussed. Keywords: Meson production, Other strange mesons, Baryon resonances (SCB0), Decays of baryons, Polarisation in interactions and scattering