Near-threshold photoproduction of $\Lambda (1520)$ from protons and deuterons

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.

5 pages and 4 figures. One reference added

References in corpus (4)

• Evidence of the Θ^+ in the γd \to K^+K^-pn reaction
• Photon induced Lambda(1520) production and the role of the K^* exchange
• Test of the reaction mechanism for gamma N -> K Lambda(1520) using the polarized photon
• Theta+ formation in inclusive gamma D -> pK- X

Cited by in corpus (6)

• The role of the $N^{\ast }(2080)$ resonance in the $\vec{\gamma }p\to K^{+}\Lambda (1520)$ reaction
• Theoretical study of the $\Lambda$(1520) photoproduction off proton target based on the new CLAS data
• Differential cross section and photon beam asymmetry for the gamma p -> pi+ n reaction at forward pi+ angles at Egamma=1.5-2.95 GeV
• Differential cross sections for Λ(1520) using photoproduction at CLAS
• Measurement of Spin Density Matrix Elements in $\Lambda (1520)$ Photoproduction at 8.2-8.8 GeV
• Producing $\Lambda (1405)$ and $\Lambda (1520)$ in ${\pi }^{-}p$ reaction to explore their inner structures