Hard exclusive electroproduction of a pion in the backward region

Abstract

We study the scaling regime of pion electroproduction in the backward region, eN->e'N'pi. We compute the leading-twist amplitude in the kinematical region, where it factorises into a short-distance matrix element and long-distance dominated nucleon Distribution Amplitudes and nucleon to pion Transition Distribution Amplitudes. Using the chiral limit of the latter, we obtain a first estimate of the cross section, which may be experimentally studied at JLab or Hermes.

8 pages, 17 figures, RevTeX; v3: update according to an erratum to be published by Phys Rev D : equations (19), (28) and (29) are modified and Fig. 3 corrected accordingly; Conclusions unchanged

References in corpus (5)

• Measurement of the N to Delta(1232) Transition at High Momentum Transfer by pi0 Electroproduction
• Virtual meson cloud of the nucleon and generalized parton distributions
• Exclusive meson pair production in gamma* gamma scattering at small momentum transfer
• Deep Inelastic Pion Electroproduction at Threshold
• Backward DVCS and Proton to Photon Transition Distribution Amplitudes

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