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

Details Measurement of the Polarized Structure Function $σ_{LT^\prime}$ for $p(\vec{e},e'p)π^o$ in the $Δ(1232)$ Resonance Region Measurement of the Polarized Structure Function $σ_{LT^\prime}$ for $p(\vec{e},e'p)π^o$ in the $Δ(1232)$ Resonance Region

2003-01-21

arxiv.org/abs/nucl-ex/0301012v2

Phys.Rev.C68:032201,2003

Physics

Nuclear Physics

Nuclear Experiment

5 pages, LaTex, 4 eps figures: to be published in PRC/Rapid Communications. Version 2 has revised Q^2 analysis

Scientific paper

10.1103/PhysRevC.68.032201

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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