Electroproduction of pi0 from Delta(1232) at high Q2 with CLAS
ORAL
Abstract
We report the analysis of exclusive single $\pi^0$ electroproduction in the $\Delta(1232)$ resonance region at Jefferson Lab in the $Q^2$ range 2 to 5 $GeV^2/c^2$. The electron beam energy was $5.75$ $GeV$, impinging on a cryogenic Hydrogen target. The CLAS spectrometer was used to detect the scattered electrons and final state protons, and the $\pi^0$'s were reconstructed by the missing mass technique. $\pi^0$ angular distributions are obtained over the entire $4 \pi$ $cm$ solid angle. The c.m. differential cross section ${d\sigma}/{d\Omega^*_{\pi^0}}$ is measured, the $M_{1+}$, $R_{em} = E_{1+}/M_{1+}$ and $Rsm = S_{1+}/M_{1+}$ multipoles for the delta resonance are extracted using the JANR unitary isobar model, along with the form factor $G^*_M$.
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Authors
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Maurizio Ungaro
JLAB
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Paul Stoler
RPI