The Small x parton content of the photon

Jun, 1992
21 pages
Published in:
  • Phys.Rev.D 46 (1992) 3778-3784
Report number:
  • M-C-TH-92-16

Citations per year

1992199620002004200602468
Abstract: (APS)
The parton content of the photon is examined systematically. In the low-Q2 region (Q2<1 GeV2) we assume the photon behaves largely according to the vector-meson-dominance (VMD) hypothesis, while for higher Q2 we supplement the VMD with a purely perturbative pointlike component and QCD corrections. Special care is taken in the region of small x: we work in the leading-logarithm approximation (LLA) in 1x at low Q2 and in the LLA in Q2 for Q2>4 GeV2. We include small-x shadowing effects in the VMD sector and show that they need not be considered in the pointlike sector where the parton content is much less.
  • photon: structure function
  • structure function: small-x
  • momentum transfer: low
  • momentum transfer: high
  • vector dominance
  • model: parton
  • quantum chromodynamics: correction
  • leading logarithm approximation
  • effect: shadowing
  • numerical calculations