Speaker
Dr
Natalie Walford
(University of Basel)
Description
In a physics world focused on dark matter, gravitational waves, and heavy photons, hadron processes and nuclear systems focusing on strangeness does not garner as much attention. However, the search for undiscovered states of the nucleon continues to yield interesting results. A large effort was done using the now defunct CEBAF Large Acceptance Spectrometer (CLAS) detector at the Thomas Jefferson National Accelerator Facility (JLab) to provide the database, which will allow for nearly model-independent partial wave analyses (PWA) to be carried out in the search for such states. Polarization observables provide a crucial role in the effort, as they are essential in disentangling the contributing resonanat and non-resonant amplitudes. Recent coupled-channel analyses have found strong sensitivity of the kaon hyperon channels to several higher mass nucleon resonances. Various experiments over the years were taken at JLab using circularly and linearly polarized tagged photons incident on
a longitudinally and transversely polarized frozen spin butanol target (FROST), liquid hydrogen or deuterium, or a hydrogen deuteride target (HD-Ice) with the reaction products detected in CLAS. The works will be compared to predictions of recent multipole analyses. These results will significantly broaden the world database for these reactions.
Primary author
Dr
Natalie Walford
(University of Basel)
