J/ψproduction through resolved photon processes at e+ e- colliders

Details J/ψproduction through resolved photon processes at e+ e- colliders J/ψproduction through resolved photon processes at e+ e- colliders

2001-01-30

arxiv.org/abs/hep-ph/0101333v2

Phys.Rev.D65:074003,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

Added a figure on parametrisation dependence of photonic parton densities and some references

Scientific paper

10.1103/PhysRevD.65.074003

We consider J/psi photoproduction in e+ e- as well as linear photon colliders. We find that the process is dominated by the resolved photon channel. Both the once-resolved and twice-resolved cross-sections are sensitive to (different combinations of) the colour octet matrix elements. Hence, this may be a good testing ground for colour octet contributions in NRQCD. On the other hand, the once-resolved J/psi production cross-section, particularly in a linear photon collider, is sensitive to the gluon content of the photon. Hence these cross-sections can be used to determine the parton distribution functions, especially the gluon distribution, in a photon, if the colour octet matrix elements are known.

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