Beam-Recoil Transferred Polarization in $K^{+}Y$ Electroproduction in the Nucleon Resonance Region with CLAS12

Abstract

Beam-recoil transferred polarizations for the exclusive electroproduction of $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ final states from an unpolarized proton target have been measured using the CLAS12 spectrometer at Jefferson Laboratory. The measurements at beam energies of 6.535~GeV and 7.546~GeV span the range of four-momentum transfer $Q^2$ from 0.3 to 4.5~GeV${}^2$ and invariant energy $W$ from 1.6 to 2.4~GeV, while covering the full center-of-mass angular range of the $K^{+}$. These new data extend the existing hyperon polarization data from CLAS in a similar kinematic range but from a significantly larger dataset. They represent an important addition to the world data, allowing for better exploration of the reaction mechanism in strangeness production processes, for further understanding of the spectrum and structure of excited nucleon states, and for improved insight into the strong interaction in the regime of non-perturbative dynamics.

25 pages, 22 figures, 4 tables

References in corpus (8)

• Measurement of beam-recoil observables Ox, Oz and target asymmetry for the reaction gamma p -> K Lambda
• Strong QCD Insights from Excited Nucleon Structure Studies with CLAS and CLAS12
• Electroproduction of kaons from the proton in a Regge-plus-resonance approach
• Strong evidence for nucleon resonances near 1900\,MeV
• Evidence for the $N^{\prime }(1720)3/2^{+}$ Nucleon Resonance from Combined Studies of CLAS ${\pi }^{+}{\pi }^{-}p$ Photo- and Electroproduction Data
• Separated Structure Functions for Exclusive $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Electroproduction at 5.5 GeV with CLAS
• Resonant contributions to inclusive nucleon structure functions from exclusive meson electroproduction data
• Induced polarization of Λ(1116) in kaon electroproduction

Cited by in corpus (4)

• Light baryon resonances from a coupled-channel study including $\mathbf{K\Sigma }$ photoproduction
• Deep Exclusive Meson Production as a probe to the puzzle of $\Lambda$ hyperon polarization
• Global Data-Driven Determination of Baryon Transition Form Factors
• Longitudinal Spin Transfer to $\Lambda$ Hyperons in Semi-Inclusive Deep Inelastic Scattering with CLAS12