Differential cross sections for Λ(1520) using photoproduction at CLAS

Abstract

The reaction $\gamma p\to K^{+}\Lambda (1520)$ using photoproduction data from the CLAS $g12$ experiment at Jefferson Lab is studied. The decay of $\Lambda (1520)$ into two exclusive channels, ${\Sigma }^{+}{\pi }^{-}$ and ${\Sigma }^{-}{\pi }^{+}$, is studied from the detected $K^{+}$, ${\pi }^{+}$, and ${\pi }^{-}$ particles. A good agreement is established for the $\Lambda (1520)$ differential cross sections with the previous CLAS measurements. The differential cross sections as a function of CM angle are extended to higher photon energies. Newly added are the differential cross sections as a function of invariant 4-momentum transfer $t$, which is the natural variable to use for a theoretical model based on a Regge-exchange reaction mechanism. No new $N^{\ast }$ resonances decaying into the $K^{+}\Lambda (1520)$ final state are found.

16 pages, 12 figures, 2 tables

References in corpus (4)

• The Flavor Structure of the Excited Baryon Spectra from Lattice QCD
• Evidence for the $N^{\prime }(1720)3/2^{+}$ Nucleon Resonance from Combined Studies of CLAS ${\pi }^{+}{\pi }^{-}p$ Photo- and Electroproduction Data
• Near-threshold photoproduction of $\Lambda (1520)$ from protons and deuterons
• Properties of the Lambda(1520) Resonance from High-Precision Electroproduction Data