Non-perturbative gluons in diffractive photo-production of J/Psi

Details Non-perturbative gluons in diffractive photo-production of J/Psi Non-perturbative gluons in diffractive photo-production of J/Psi

2001-10-11

arxiv.org/abs/hep-ph/0110162v1

Phys.Lett. B521 (2001) 259-266

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 5 figures, RevTex, Accepted for publication in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(01)01230-8

The modifications induced in the calculation of the cross section of the diffractive process gamma gamma -> J/Psi J/Psi when the gluon propagator is changed are analyzed. Instead of the usual perturbative gluon propagator, alternative forms obtained using non-perturbative methods like Dyson-Schwinger equations are used to consider in a more consistent way the contributions of the infrared region. The result shows a reduction in the differential cross-section for low momentum transfer once compared with the perturbative result, to be confirmed with future experimental results from TESLA.

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