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:
Report number:
  • CPHT-003-0107,
  • CPHT-003.0107

Citations per year

2004200920142019202302468
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