Separated structure functions for the exclusive electroproduction of K+ Lambda and K+ Sigma0 final states

Collaboration
Nov, 2006
61 pages
Published in:
  • Phys.Rev.C 75 (2007) 045203
e-Print:
Report number:
  • JLAB-PHY-06-576
Experiments:
  • JLAB-CLAS

Citations per year

200620112016202120240246810
Abstract:
We report measurements of the exclusive electroproduction of K+ΛK^+\Lambda and K+Σ0K^+\Sigma^0 final states from a proton target using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The separated structure functions σT\sigma_T, σL\sigma_L, σTT\sigma_{TT}, and σLT\sigma_{LT} were extracted from the Φ\Phi- and ϵ\epsilon-dependent differential cross sections taken with electron beam energies of 2.567, 4.056, and 4.247 GeV. This analysis represents the first σL/σT\sigma_L/\sigma_T separation with the CLAS detector, and the first measurement of the kaon electroproduction structure functions away from parallel kinematics. The data span a broad range of momentum transfers from 0.5Q22.80.5\leq Q^2\leq 2.8 GeV2^2 and invariant energy from 1.6W2.41.6\leq W\leq 2.4 GeV, while spanning nearly the full center-of-mass angular range of the kaon. The separated structure functions reveal clear differences between the production dynamics for the Λ\Lambda and Σ0\Sigma^0 hyperons. These results provide an unprecedented data sample with which to constrain current and future models for the associated production of strangeness, which will allow for a better understanding of the underlying resonant and non-resonant contributions to hyperon production.
  • 13.85.Fb
  • 14.20.Jn
  • 13.60.Rj
  • 13.40.-f
  • CLAS
  • kaon electroproduction
  • structure functions
  • hyperons
  • electron p: exclusive reaction
  • K+: electroproduction