Neutral Pion Electroproduction in the Resonance Region at High $Q^2$

2009 
The process $$ep \to e^{\prime}p^{\prime}\pi^0$$ has been measured at $Q^2$$ = 6.4 and 7.7 \ufourmomts in Jefferson Lab's Hall C. Unpolarized differential cross sections are reported in the virtual photon-proton center of mass frame considering the process $$\gamma^{\ast}p \to p^{\prime}\pi^0$. Various details relating to the background subtractions, radiative corrections and systematic errors are discussed. The usefulness of the data with regard to the measurement of the electromagnetic properties of the well known $$\Delta(1232)$$ resonance is covered in detail. Specifically considered are the electromagnetic and scalar-magnetic ratios $$R_{EM}$$ and $$R_{SM}$$ along with the magnetic transition form factor $$G_M^{\ast}$$. It is found that the rapid fall off of the $$\Delta(1232)$$ contribution continues into this region of momentum transfer and that other resonances
    • Correction
    • Source
    • Cite
    • Save
    • Machine Reading By IdeaReader
    58
    References
    25
    Citations
    NaN
    KQI
    []