Measurement of the Polarized Structure Function $\sigma_{LT^\prime}$ for $p(\vec{e},e'p)\pi^o$ in the $\Delta(1232)$ Resonance Region

CLAS Collaboration: K. Joo; et al; L.C. Smith

Measurement of the Polarized Structure Function $\sigma_{LT^\prime}$ for $p(\vec{e},e'p)\pi^o$ in the $\Delta(1232)$ Resonance Region

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arxiv nucl-ex/0301012 v2 pith:OXCYQI7M submitted 2003-01-21 nucl-ex

CLAS Collaboration: K. Joo , L.C. Smith , et al This is my paper · ORCID

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abstract

The polarized longitudinal-transverse structure function $\sigma_{LT^\prime}$ has been measured in the $\Delta(1232)$ resonance region at $Q^2=0.40$ and 0.65 GeV$^2$. Data for the $p(\vec e,e'p)\pi^o$ reaction were taken at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS) using longitudinally polarized electrons at an energy of 1.515 GeV. For the first time a complete angular distribution was measured, permitting the separation of different non-resonant amplitudes using a partial wave analysis. Comparison with previous beam asymmetry measurements at MAMI indicate a deviation from the predicted $Q^2$ dependence of $\sigma_{LT^{\prime}}$ using recent phenomenological models.

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