Hard exclusive electroproduction of a pion in the backward region
Jan, 2007
8 pages
Published in:
- Phys.Rev.D 75 (2007) 074004,
- Phys.Rev.D 77 (2008) 019902 (erratum)
e-Print:
- hep-ph/0701125 [hep-ph]
Report number:
- CPHT-003-0107,
- CPHT-003.0107
View in:
Citations per year
Abstract: (arXiv)
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.Note:
- 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
- 13.60.Le
- 12.38.Bx
- 13.60.-r
- electron p: inelastic scattering
- hard scattering
- photon p: inelastic scattering
- photon: polarization
- pi0: electroproduction
- backscatter
- effect: higher-twist
References(29)
Figures(0)