We report the exclusive photoproduction cross sections for the0(1385),(1405), and(1520) in the reactions γ + p → K + + Y ∗ using the CLAS detector for energies from near the respective production thresholds up to a center-of-mass energyW of 2.85 GeV. The differential cross sections are integrated to give the total exclusive cross sections for each hyperon. Comparisons aremade to current theoretical models based on the effective-Lagrangian approach and fit to previous data. The accuracy of these models is seen to vary widely. The cross sections for the (1405) region are strikingly different for the +π−, 0π0, and −π+ decay channels, indicating the effect of isospin interference, especially at W values close to the threshold.
Differential photoproduction cross sections of the Σ^{0}(1385), Λ(1405), and Λ(1520)
CONTALBRIGO, Marco;PAPPALARDO, Luciano Libero;
2013
Abstract
We report the exclusive photoproduction cross sections for the0(1385),(1405), and(1520) in the reactions γ + p → K + + Y ∗ using the CLAS detector for energies from near the respective production thresholds up to a center-of-mass energyW of 2.85 GeV. The differential cross sections are integrated to give the total exclusive cross sections for each hyperon. Comparisons aremade to current theoretical models based on the effective-Lagrangian approach and fit to previous data. The accuracy of these models is seen to vary widely. The cross sections for the (1405) region are strikingly different for the +π−, 0π0, and −π+ decay channels, indicating the effect of isospin interference, especially at W values close to the threshold.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.