Abstract
Measurements of γp→K +Λ and γp→K +σ0 cross-sections have been obtained with the photon tagging facility and the Crystal Ball calorimeter at MAMI-C. The measurement uses a novel K + meson identification technique in which the weak decay products are characterized using the energy and timing characteristics of the energy deposit in the calorimeter, a method that has the potential to be applied at many other facilities. The fine center-of-mass energy (W) resolution and statistical accuracy of the new data results in a significant impact on partial wave analyses aiming to better establish the excitation spectrum of the nucleon. The new analyses disfavor a strong role for quark-diquark dynamics in the nucleon.
Original language | English |
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Pages (from-to) | 112-118 |
Number of pages | 7 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 735 |
Early online date | 10 Jun 2014 |
DOIs | |
Publication status | Published - 30 Jul 2014 |
Keywords
- Baryon spectroscopy
- Photoproduction
- Strangeness