Polarized Structure Function \(\sigma_{LT'}\) for \(p({\vec e},e'K^+)\Lambda\) in the Nucleon Resonance Region

• Published in: arXiv.org
• Main Authors: Nasseripour, Rakhsha, Raue, Brian, Carman, Daniel, Ambrozewicz, Pawel, the CLAS Collaboration
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 30.01.2008
• Subjects: Kaons; Nucleons; Resonance
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.0801.4711

The first measurements of the polarized structure function \(\sigma_{LT'}\) for the reaction \(p(\vec e,e'K^+)\Lambda\) in the nucleon resonance region are reported. Measurements are included from threshold up to \(W\)=2.05 GeV for central values of \(Q^2\) of 0.65 and 1.00 GeV\(^2\), and nearly the entire kaon center-of-mass angular range. \(\sigma_{LT'}\) is the imaginary part of the longitudinal-transverse response and is expected to be sensitive to interferences between competing intermediate s-channel resonances, as well as resonant and non-resonant processes. The results for \(\sigma_{LT'}\) are comparable in magnitude to previously reported results from CLAS for \(\sigma_{LT}\), the real part of the same response. An intriguing sign change in \(\sigma_{LT'}\) is observed in the high \(Q^2\) data at \(W\approx 1.9\) GeV. Comparisons to several existing model predictions are shown.