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A measurement of the axial form factor of the nucleon by the p(e,e'pi+)n reaction at W=1125 MeV
A1 Collaboration, A. Liesenfeld
The reaction p(e,e'pi+)n was measured at the Mainz Microtron MAMI at an invariant mass of W=1125 MeV and four-momentum transfers of Q^2=0.117, 0.195 and 0.273 (GeV/c)^2. For each v…
Pion Electroproduction on the Nucleon and the Generalized GDH Sum Rule
L. Tiator, D. Drechsel, S. S. Kamalov
We present predictions for the spin structure functions of the proton and the neutron in the framework of a unitary isobar model for one-pion photo- and electroproduction. Our resu…
A polarization relation and the measurement of the longitudinal response in pseudoscalar meson electroproduction off the nucleon
Hartmut Schmieden, Lothar Tiator
For pseudoscalar meson electroproduction off the nucleon in parallel kinematics a relation between three polarization observables is derived. It is shown that, without Rosenbluth s…
Determination of the E2/M1 Ratio in the γN \to Δ(1232) Transition from a Simultaneous Measurement of p(\vecγ,p)π^0 and p(\vecγ,π^+)n
R. Beck
Tagged linearly polarized photons have been used at the Mainz Microtron MAMI for simultaneous measurements of the p(\vecγ,p)π^0 and p(\vecγ,π^+)n reaction channels to study the γN…
Generalized polarizabilities and electroexcitation of the nucleon
D. Drechsel, S. S. Kamalov, G. Krein +2
Generalized nucleon polarizabilities for virtual photons can be defined in terms of electroproduction cross sections as function of the 4-momentum transfer . In particular, th…
Medium Effects in Coherent Pion Photo- and Electroproduction on 4He and 12C
D. Drechsel, L. Tiator, S. S. Kamalov +1
Coherent pi0 photo- and electroproduction on 4He and 12C nuclei is investigated in the framework of a distorted wave impulse approximation in momentum space. The elementary process…