Differential cross sections for γ+p→K++Y for Λ and Σ0 hyperons
Abstract
High-statistics cross sections for the reactions γ+p→K++Λ and γ+p→K++Σ0 have been measured using CLAS at Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85<cosθK+c.m.<+0.95. In the K+Λ channel we confirm a resonance-like structure near W=1.9 GeV at backward kaon angles. The position and width of this structure change with angle, indicating that more than one resonance is likely playing a role. The K+Λ channel at forward angles and all energies is well described by a t-channel scaling characteristic of Regge exchange, whereas the same scaling applied to the K+Σ0 channel is less successful. Several existing theoretical models are compared to the data, but none provide a good representation of the results.
- Publication:
-
Physical Review C
- Pub Date:
- March 2006
- DOI:
- 10.1103/PhysRevC.73.035202
- arXiv:
- arXiv:nucl-ex/0509033
- Bibcode:
- 2006PhRvC..73c5202B
- Keywords:
-
- 25.20.Lj;
- 13.40.-f;
- 13.60.Le;
- 14.20.Gk;
- Photoproduction reactions;
- Electromagnetic processes and properties;
- Meson production;
- Baryon resonances with S=0;
- Nuclear Experiment;
- High Energy Physics - Experiment
- E-Print:
- 26 pages, 26 figures