Separated Structure Functions for Exclusive $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Electroproduction at 5.5 GeV with CLAS

Abstract

We report measurements of the exclusive electroproduction of $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ final states from an unpolarized proton target using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The separated structure functions ${\sigma }_U$, ${\sigma }_{LT}$, ${\sigma }_{TT}$, and ${\sigma }_{L{T}^{\prime }}$ were extracted from the $\Phi$-dependent differential cross sections acquired with a longitudinally polarized 5.499 GeV electron beam. The data span a broad range of momentum transfers $Q^2$ from 1.4 to 3.9 GeV${}^2$, invariant energy $W$ from threshold to 2.6 GeV, and nearly the full center-of-mass angular range of the kaon. The separated structure functions provide an unprecedented data sample, which in conjunction with other meson photo- and electroproduction data, will help to constrain the higher-level analyses being performed to search for missing baryon resonances.

27 pages, 23 figures

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• Deeply Virtual Meson Production on the nucleon
• Measurements of $ep\to e^{\prime }{\pi }^{+}n$ at W = 1.6 - 2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS
• Strong QCD Insights from Excited Nucleon Structure Studies with CLAS and CLAS12
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• Induced polarization of Λ(1116) in kaon electroproduction
• $K^0\Lambda$ photoproduction off the neutron with nucleon resonances
• Beam-Recoil Transferred Polarization in $K^{+}Y$ Electroproduction in the Nucleon Resonance Region with CLAS12
• $K^{+}\Lambda$ electroproduction above the resonance region
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Nucleon Resonance Structure Studies Via Exclusive KY Electroproduction
• Excited Baryon Structure Using Exclusive Reactions with CLAS12