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Backward-angle meson electroproduction above the resonance region, which waspreviously ignored, is anticipated to offer unique access to the three quarkplus sea component of the nucleon wave function. In this letter, we present thefirst complete separation of the four electromagnetic structure functions abovethe resonance region in exclusive omega electroproduction off the proton, e + p-> e' + p + omega, at central Q^2 values of 1.60, 2.45 GeV^2 , at W = 2.21 GeV.The results of our pioneering -u ~ -u min study demonstrate the existence of aunanticipated backward-angle cross section peak and the feasibility of fullL/T/LT/TT separations in this never explored kinematic territory. At Q^2 =2.45GeV^2 , the observed dominance of sigma_T over sigma_L, is qualitativelyconsistent with the collinear QCD description in the near-backward regime, inwhich the scattering amplitude factorizes into a hard subprocess amplitude andbaryon to meson transition distribution amplitudes (TDAs): universalnon-perturbative objects only accessible through backward angle kinematics.

Unique Access to u-Channel Physics: Exclusive Backward-Angle Omega Meson Electroproduction