We have measured the cross section for quasielastic 1p-shell proton knockout in the 16O(e,e(')p) reaction at omega = 0.439 GeV and Q2 = 0.8 (GeV/c)(2) for missing momentum P(miss)=355 MeV/c. We have extracted the response functions R(L+TT), R(T), R(LT), and the left-right asymmetry, A(LT), for the 1p(1/2) and the 1p(3/2) states. The data are well described by relativistic distorted wave impulse approximation calculations. At large P(miss), the structure observed in A(LT) indicates the existence of dynamical relativistic effects.
We report measurements of cross sections for the reaction 1 H(e,eЈK ϩ )Y , for both the ⌳ and ⌺ 0 hyperon states, at an invariant mass of Wϭ1.84 GeV and four-momentum transfers 0.5ϽQ 2 Ͻ2 (GeV/c) 2 . Data were taken for three values of virtual photon polarization ⑀, allowing the decomposition of the cross sections into longitudinal and transverse components. The ⌳ data are a revised analysis of prior work, whereas the ⌺ 0 results have not been previously reported.
Virtual Compton Scattering (VCS) on the proton has been studied at Jefferson Lab using the exclusive photon electroproduction reaction ep → epγ. This paper gives a detailed account of the analysis which has led to the determination of the structure functions PLL − PT T /ǫ and PLT , and the electric and magnetic generalized polarizabilities (GPs) αE(Q 2 ) and βM (Q 2 ) at values of the four-momentum transfer squared Q 2 = 0.92 and 1.76 GeV 2 . These data, together with the results of VCS experiments at lower momenta, help building a coherent picture of the electric and magnetic GPs of the proton over the full measured Q 2 -range, and point to their non-trivial behavior.
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