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Differential photoproduction cross sections of the Σ0(1385), Λ(1405), and Λ(1520)

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posted on 2013-05-30, 00:00 authored by Kei Moriya, Reinhard A. Schumacher, M. Bellis, A. Biselli, B. Dey, D. Ho, H. Y. Lu, Curtis MeyerCurtis Meyer, Michael E. McCracken, Brian Vernarsky, M. Williams, CLAS Collaboration
<p>We report the exclusive photoproduction cross sections for the Σ0(1385), Λ(1405), and Λ(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 energy W of 2.85 GeV. The differential cross sections are integrated to give the total exclusive cross sections for each hyperon. Comparisons are made 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 Λ(1405) region are strikingly different for the Σ+π−, Σ0π0, and Σ−π+ decay channels, indicating the effect of isospin interference, especially at W values close to the threshold.</p>

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©2013 American Physical Society

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2013-05-30

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