Measurement of ep{yields}ep{pi}{sup 0} beam spin asymmetries above the resonance region

The beam spin asymmetry (BSA) in the exclusive reaction e-vectorp{yields}ep{pi}{sup 0} was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer (CLAS). The x{sub B},Q{sup 2},t, and {phi} dependences of the {pi}{sup 0} BSA are presented in the deep inelastic regime. The asymmetries are fitted with a sin{phi} function and their amplitudes are extracted. Overall, they are of the order of 0.04-0.11 and roughly independent of t. This is the signature of a nonzero longitudinal-transverse interference. The implications concerning the applicability of a formalism based on generalized parton distributions, as well as the extension of a Regge formalism at high photon virtualities, are discussed.