| Near-threshold photoproduction of $\Lambda(1520)$ from protons and deuterons (2009) | |||||||||
|
|||||||||
Abstract | |||||||||
| Photoproduction of $\Lambda$(1520) with liquid hydrogen and deuterium targets was examined at photon energies below 2.4 GeV in the SPring-8 LEPS experiment. For the first time, the differential cross sections were measured at low energies and with a deuterium target. A large asymmetry of the production cross sections from protons and neutrons was observed at backward K$^{+/0}$ angles. This suggests the importance of the contact term, which coexists with t-channel K exchange under gauge invariance. This interpretation was compatible with the differential cross sections, decay asymmetry, and photon beam asymmetry measured in the production from protons at forward K$^+$ angles.. Comment: 5 pages and 4 figures. One reference added | |||||||||
Publication details | |||||||||
| |||||||||