Speaker
Dr
Thomas Jude
(The University of Bonn)
Description
The BGO-OD experiment at the ELSA accelerator facility uses an energy tagged bremstrahlung photon beam to investigate the internal structure of the nucleon. The setup consists of a highly segmented BGO calorimeter surrounding the target, with a particle tracking magnetic spectrometer at forward angles.
BGO-OD is ideal for investigating low momentum transfer processes due to the acceptance and high momentum resolution at forward angles. In particular, this enables the investigation of strangeness photoproduction where t-channel exchange mechanisms play a dominant role. As part of an extensive strangeness photoproduction experimental programme, the differential cross section measurements for $K^+\Lambda$ and $K^+\Sigma^0$ photoproduction at centre of mass polar angles between 4 to 25 degrees will be presented.
These first data at extremely forward angles are important for partial wave analyses, and models where accurate knowledge of t-channel mechanisms are required. The data also constrain models for hypernuclei electroproduction, where at very low Q2, the $K^+ \Lambda $ cross section is comparable to photoproduction.
Preliminary differential cross sections, and recoiling baryon asymmetries will be shown. Opportunities to constrain the Y-N interaction using deuterium target data which is anticipated this year will also be presented.
Primary author
Dr
Thomas Jude
(The University of Bonn)
