Differential cross sections and polarization observables from CLAS K photoproduction and the search for new N states

The CLAS Collaboration

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The reaction γp→K⁎+Λ was measured using the CLAS detector for photon energies between the threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. For the first time, spin-density matrix elements have been extracted for this reaction. Differential cross sections, spin density matrix elements, and the Λ recoil polarization are compared with theoretical predictions using the BnGa partial wave analysis. The main result is the evidence for significant contributions from N(1895)1/2 and N(2100)1/2+ to the reaction. Branching ratios for decays into KΛ for these resonances and further resonances are reported.

Original languageEnglish (US)
Pages (from-to)142-150
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume771
DOIs
StatePublished - Aug 10 2017

Keywords

  • Baryon spectroscopy
  • Meson photoproduction
  • Polarization observables

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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