A fresh look at diffractive J/ψ photoproduction at HERA, with predictions for THERA
نویسندگان
چکیده
منابع مشابه
A fresh look at diffractive J/ψ photoproduction at HERA, with predictions for THERA
We quantify perturbative and non-perturbative QCD effects in the exclusive J/ψ-photoproduction cross section, and in the shrinkage of the differential cross section with respect to momentum transfer, t. We predict that in the high energy THERA region there will always be a significant contribution to this process that rises quickly with energy. This implies that the taming of the rise of the cr...
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A fresh look at diffractive J/ψ photoproduction at HERA, with predictions for THERA. Abstract A new analysis of the photoproduction of the J/ψ-family is presented incorporating our recent model for the dipole cross section. The relative contributions from small and large transverse size fluctuations of the photon are clear and explicitly illustrate the mixing of pertur-bative and non-perturbati...
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Cross sections for the diffractive photoproduction of the Υ-family at HERA energies, within the framework of the analysis by Frankfurt, Köpf and Strikman [1,2], are presented. They compare well with the recent preliminary data from ZEUS and H1. Two novel effects lead to a significant enhancement of the original calculation: the non-diagonal (or skewed) kinematics, calculated to leading-log(Q) a...
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The cross section of the D *-meson diffractive photoproduction at the HERA collider has been calculated in the framework of perturbatively motivated model for the different kine-matic regions. The camparison between the different Pomeron models has been performed.
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Predictions for the diffractive photoproduction of the Υ-family at HERA energies, within the framework of the analysis by Frankfurt, Koepf and Strikman, are presented. Two novel effects lead to a significant enhancement of the original calculation: the non-diagonal (or skewed) kinematics, calculated to leading-log(Q) accuracy, and the large magnitude of the real part of the amplitude. The resul...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2001
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2001/03/045