Saturation model for two-photon interactions at high energies
2002 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 23, no 3, 513-526 p.Article in journal (Refereed) Published
We formulate and analyse a saturation model for the total γγ and γ∗γ∗ cross-sections and for the real photon structure function Fγ2(x,Q2) . The model is based on a picture in which the γ∗γ∗ total cross-section for arbitrary photon virtualities is driven by the interaction of colour dipoles into which the virtual photons fluctuate. The cross-section describing this interaction is assumed to satisfy the saturation property with the saturation radius taken from the Golec-Biernat and Wüsthoff analysis of the γ∗p interaction at HERA. The model is supplemented by the QPM and non-pomeron reggeon contributions. The model gives a very good description of the data on the γγ total cross-section, on the photon structure function Fγ2(x,Q2) at lowx and on the γ∗γ∗ cross-section extracted from LEP double tagged events. The production of heavy flavours in γγ collisions is also studied. Predictions of the model for the very high energy range which will be probed at future linear colliders are given.
Place, publisher, year, edition, pages
Springer-Verlag, Berlin, Heidelberg , 2002. Vol. 23, no 3, 513-526 p.
IdentifiersURN: urn:nbn:se:uu:diva-45293DOI: 10.1007/s100520200893OAI: oai:DiVA.org:uu-45293DiVA: diva2:73200