Studies of multihadronic final states in photon-photon interactions.

Authors :: Behrend, H.
Criegee, L.
Field, J.
Franke, G.
Jung, H.
Meyer, J.
Podobrin, O.
Schröder, V.
Winter, G.
Bussey, P.
Campbell, A.
Hendry, D.
Lumsdon, S.
Skillicorn, I.
Ahme, J.
Blobel, V.
Feindt, M.
Fenner, H.
Harjes, J.
Köhne, J.
Source :: Zeitschrift für Physik. C, Particles & Fields; 1991, Vol. 51 Issue 3, p365-375, 11p
Publication Year :: 1991
Abstract: We have measured the cross section and Q-dependence of the reaction γγ→ multihadrons, using the CELLO detector at DESY, for visible final-state masses between 4 and 9 GeV. The data are well fitted by an incoherent sum of Generalised Vector Meson Dominance and Quark Parton Model terms, but at low Q require the addition of a third component which resembles the QPM but is less two-jet-like. With and without this term, the GVDM cross section at Q=0 is found to be 200±20 and 250±25 nb, respectively. [ABSTRACT FROM AUTHOR]