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

Journal Article · · Physical Review C
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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 (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-060R23177
OSTI ID:
955830
Report Number(s):
JLAB-PHY-08-772; arXiv:0801.4711; DOE/OR/23177-0326; PRVCAN; TRN: US1004768
Journal Information:
Physical Review C, Vol. 77; ISSN 0556-2813
Country of Publication:
United States
Language:
English

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