Measurement of J/ψ and ψ′ real photoproduction on lithium-6 at a mean energy of 90 GeV.

Authors :: Barate, R.
Bareyre, P.
Bloch, D.
Bonamy, P.
Borgeaud, P.
Bouquet, B.
Brunet, J.
Burmeister, H.
Burchell, M.
Costa Ramos, S.
D'Almagne, B.
David, M.
Bellefon, A.
Bouard, G.
Lesquen, A.
Dello Russo, P.
Duane, A.
Engel, J.
Engelen, J.
Ferrer, A.
Source :: Zeitschrift für Physik. C, Particles & Fields; 1987, Vol. 33 Issue 4, p505-512, 8p
Publication Year :: 1987
Abstract: Inelastic and elastic J/ψ (3097) photoproduction on Li are measured at a mean γ energy of 90 GeV in an open spectrometer. The J/ψ are identified by their decays into μ μ or e e. A signal of ψ′(3685) into μ μ and J/ψ π π is also seen. The inelastic cross-section with Z=E/E<0.9 is compared in shape and magnitude with the colour singlet model of photon-gluon fusion. [ABSTRACT FROM AUTHOR]

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