Measurement of A_TL^' for KΛ electroproduction with CLAS

Details Measurement of A_TL^' for KΛ electroproduction with CLAS Measurement of A_TL^' for KΛ electroproduction with CLAS

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprc10010r&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Measurements of the electron-beam spin asymmetry, A_TL^', for the p(e,e^' K^+)Λ^0 reaction have been performed using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Data were collected for beam energies of 2.6 and 4.2 GeV with Q^2≈ 1.0 to 3.0 GeV^2 and W from threshold to approximately 2.5 GeV. The large acceptance of CLAS allows for full azimuthal angle coverage over a large range of center-of-mass angles. The ultimate goal is to extract σ_TL^' which is sensitive to interferences between resonant and non-resonant amplitudes. Preliminary results indicate that A_TL^' is much larger than what is expected from state-of-the-art hadrodynamic model calculations. This measurement is part of a larger CLAS program to measure cross sections and polarization observables for kaon electroproduction in the nucleon resonance region and is a crucial component of identifying missing N resonances that decay into strange final states.

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