Parametrization of F-2(gamma) at low Q(2) and of sigma(gamma gamma) and sigma(gamma*gamma) at high energies - art. no. 074021

Citation
B. Badelek et al., Parametrization of F-2(gamma) at low Q(2) and of sigma(gamma gamma) and sigma(gamma*gamma) at high energies - art. no. 074021, PHYS REV D, 6207(7), 2000, pp. 4021
Citations number
47
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6207
Issue
7
Year of publication
2000
Database
ISI
SICI code
0556-2821(20001001)6207:7<4021:POFALQ>2.0.ZU;2-F
Abstract
A parametrization of the real photon structure function F-2(gamma) in the l aw Q(2), low x region is formulated. It includes both the vector meson domi nance (VMD) and the QCD components, the latter suitably extrapolated to the low Q(2) region and based on arbitrary parton distributions in the photon. The parametrization used together with the Gluck, Reya, and Vogt (GRV) and Gluck, Reya, and Schienbein (GRS) parton densities describes reasonably we ll the existing high energy data on F-2(gamma), sigma(gamma gamma), and the low Q(2) data on sigma(gamma*gamma). Predictions for sigma(gamma gamma) an d for sigma(gamma*gamma) for energies which may become accessible in future linear colliders are also given.