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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...
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
2001
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.89.032001 http://cds.cern.ch/record/532221 |