Cross sections and Rosenbluth separations in 1H(e, e'K+)Lambda up to Q2=2.35 GeV2

Abstract

The kaon electroproduction reaction 1H(e,e'K+)Lambda was studied as a function of the virtual-photon four-momentum, Q2, total energy, W, and momentum transfer, t, for different values of the virtual- photon polarization parameter. Data were taken at electron beam energies ranging from 3.40 to 5.75 GeV. The center of mass cross section was determined for 21 kinematics corresponding to Q2 of 1.90 and 2.35 GeV2 and the longitudinal, sigmaL, and transverse, sigmaT, cross sections were separated using the Rosenbluth technique at fixed W and t. The separated cross sections reveal a flat energy dependence at forward kaon angles not satisfactorily described by existing electroproduction models. Influence of the kaon pole on the cross sections was investigated by adopting an off-shell form factor in the Regge model which better describes the observed energy dependence of sigmaT and sigmaL.

5 pages, 4 figures. Submitted to Physical Review C, Rapid Communications

References in corpus (4)

• Differential Cross Sections for gamma + p --> K+ + Y for Lambda and Sigma0 Hyperons
• The gamma + p to K+ + Lambda and gamma + p to K+ + Sigma0 reactions at forward angles with photon energies from 1.5 to 2.4 GeV
• Separated Structure Functions for the Exclusive Electroproduction of $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Final States
• Separation of the Longitudinal and Transverse Cross Sections in the p(ee'K)Lambda and p(ee'K)Sigma Reactions

Cited by in corpus (16)

• Insights into the Emergence of Mass from Studies of Pion and Kaon Structure
• The pion: an enigma within the Standard Model
• Revealing the structure of light pseudoscalar mesons at the Electron-Ion Collider
• Deeply Virtual Meson Production on the nucleon
• A Bayesian analysis of kaon photoproduction with the Regge-plus-resonance model
• Photo- and electroproduction of $K^{+}\Lambda$ with unitarity-restored isobar model
• Separated Kaon Electroproduction Cross Section and the Kaon Form Factor from 6 GeV JLab Data
• Exclusive electroproduction of K+ Lambda and K+ Sigma^0 final states at Q^2 = 0.030-0.055 (GeV/c)^2
• High-resolution hypernuclear spectroscopy at Jefferson Lab, Hall A
• Induced polarization of Λ(1116) in kaon electroproduction
• High Resolution Hypernuclear Spectroscopy at Jefferson Lab Hall A
• Theoretical Analysis of the $p\bar{p}\to {\pi }^0{e}^{+}{e}^{-}$ Process within a Regge Framework
• $K^{+}\Lambda$ electroproduction above the resonance region
• Spectroscopic parameters and electromagnetic form factor of kaon in vacuum and a dense medium
• Hard exclusive processes involving kaons
• Kaon transverse charge density from space- and timelike data