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Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region up to the Deep Inelastic Region at Backward Angles

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Academic year: 2021

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FIG. 1: Kinematics for photon electroproduction on the pro- pro-ton (a) and lowest order amplitudes for Bethe-Heitler (b, c), VCS Born (d, e), VCS Non-Born (f), and t-channel π 0  -exchange (g) processes
FIG. 2: Squared missing mass M X 2 for an experimental setting at W = 1.2 GeV (a) and zoom around the γ peak (b)
FIG. 3: (Color online) Excitation curves for the H(e, e ′ p)γ reaction at Q 2 = 1 GeV 2 , cos θ ∗ γγ = −0.975, k lab = 4.032 GeV and six values of φ, as marked
FIG. 4: (Color online) The Q 2 -dependence of the reduced cross section hd 2 σ γ i in photon electroproduction (see text), at fixed cos θ ∗ γγ = −0.975, k lab = 4.032 GeV and W = 1.53 GeV (statistical error only)
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