Electroproduction of $\pi^0$ in the resonance region at high $Q^2$ with CLAS

ORAL

Abstract

An extensive program is underway at Jefferson Lab to study the eletromagnetic excitations of baryon states. We report the analysis of exclusive single $\pi^0$ and $\eta$ electroproduction in the resonance region at Jefferson Lab in the $Q^2$ range of 2 to 6 $GeV^2/c^2$. A longitudinally polarized $5.75$ $GeV$ electron beam was incident on a 5 cm long liquid Hydrogen target. The CLAS spectrometer at Jefferson Lab was used to detect the final state particles. The average beam polarization was $70\%$. The data was taken between October 2001 and January 2002. Preliminary results for differential cross sections and beam spin asymmetries over the entire $4\pi$ $c.m.$ solid angle will be presented. This high precision measurement will allow us to access the structure and dynamics of nucleon excitations with masses up to 2 $GeV$.

Authors

  • Maurizio Ungaro

    JLAB/UCONN

  • Kyungseon Joo

    UCONN