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Evidence for Colour-Octet Mechanism from CERN LEP2 $\gamma \gamma \to J/\psi$ + X Data

We present theoretical predictions for the transverse-momentum distribution of J/psi mesons promptly produced in gamma gamma collisions within the factorization formalism of nonrelativistic quantum chromodynamics, including the contributions from both direct and resolved photons, and we perform a co...

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Detalles Bibliográficos
Autores principales:	Klasen, M, Kniehl, Bernd A, Mihaila, L N, Steinhauser, M
Lenguaje:	eng
Publicado:	2001
Materias:	Particle Physics - Phenomenology
Acceso en línea:	https://dx.doi.org/10.1103/PhysRevLett.89.032001 http://cds.cern.ch/record/532221

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