Polarized structure function sigma_lt' for kaon electroproduction in the nucleon resonance region
Journal Article
·
OSTI ID:923804
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA
- Sponsoring Organization:
- USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 923804
- Report Number(s):
- JLAB-PHY-08-798; DOE/OR/23177-0318
- Country of Publication:
- United States
- Language:
- English
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