Photoproduction of {Sigma}{sup +}K{sub s}{sup 0} with the CBELSA/TAPS-setup

Journal Article · Thu Aug 05 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3483395· OSTI ID:21426458

Ewald, Ralf ^[1]

---

1. Physics Institute, University of Bonn (Germany)

Albeit quark models explain the known baryon spectrum reasonably well, they all overpredict the number of states significantly. This is often called the 'missing resonance' problem. It is speculated, that some of these resonances remained undetected in pi-induced reactions, but have a sizeable coupling to channels with strangeness involved. This provided our motivation to measure cross sections and polarisation observables in associated Kaon-Hyperon photoproduction with the focus on the {Sigma}{sup +}K{sub s}{sup 0} channel. Up to now, for this particular channel only limited data exists from the SAPHIR-, CLAS- and CBELSA/TAPS-collaboration for total and differential cross sections, and for recoil polarisation. Using the linearly polarised, energy tagged photon beam at the ELSA particle accelerator of Bonn University, data were taken with the combined photon spectrometers Crystal Barrel and TAPS. This setup is well suited to detect multi photon final states and therefore ideal to measure the reaction channel {gamma}p{yields}{Sigma}{sup +}K{sub s}{sup 0{yields}}p{pi}{sup 0{pi}0{pi}0{yields}}p6{gamma}. Here the extraction of cross sections, the recoil polarisation P and the photon asymmetry {Sigma}, which is measured for the first time, will be discussed.

• OSTI ID: 21426458
• Journal Information: AIP Conference Proceedings, Vol. 1257, Issue 1; Conference: HADRON 2009: 13. international conference on hadron spectroscopy, Tallahassee, FL (United States), 29 Nov - 4 Dec 2009; Other Information: DOI: 10.1063/1.3483395; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CEBAF ACCELERATOR
DIFFERENTIAL CROSS SECTIONS
KAON-HYPERON INTERACTIONS
KAONS NEUTRAL SHORT-LIVED
MULTIPARTICLE SPECTROMETERS
MULTI-PHOTON PROCESSES
PARTICLE IDENTIFICATION
PHOTON BEAMS
PHOTON-NUCLEON INTERACTIONS
PHOTONS
PHOTOPRODUCTION
POLARIZATION
QUARK MODEL
RECOILS
SIGMA PLUS PARTICLES
STRANGENESS
ACCELERATORS
BARYONS
BASIC INTERACTIONS
BEAMS
BOSONS
COMPOSITE MODELS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
KAONS
KAONS NEUTRAL
LINEAR ACCELERATORS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESON-BARYON INTERACTIONS
MESON-HYPERON INTERACTIONS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PSEUDOSCALAR MESONS
SIGMA BARYONS
SIGMA PARTICLES
SPECTROMETERS
STRANGE MESONS
STRANGE PARTICLES