Abstract
gamma p rightarrow K^{+} Lambda differential cross sections and recoil polarisation data from threshold for extremely forward angles are presented. The measurements were performed at the BGOOD experiment at ELSA, utilising the high angular and momentum resolution forward spectrometer for charged particle identification. The high statistics and forward angle acceptance enables the extraction of the cross section as the minimum momentum transfer to the recoiling hyperon is approached.
Highlights
Associated strangeness (K Y ) photoproduction is a crucial area of study to elucidate the nucleon excitation spectrumV
The high statistics and forward angle acceptance enables the extraction of the cross section as the minimum momentum transfer to the recoiling hyperon is approached
At forward angles, where the cosine of the centre of mass K + polar angle, cos θCKM, exceeds 0.9, there is a paucity of data to constrain the reaction mechanism, and the existing cross section data of SAPHIR [20] and CLAS [14,15,18] have pronounced inconsistencies2
Summary
Associated strangeness (K Y ) photoproduction is a crucial area of study to elucidate the nucleon excitation spectrum.
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