Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-05-23
Phys.Lett. B341 (1994) 228-237
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, $ 6 figures (to be requested)
Scientific paper
10.1016/0370-2693(94)90314-X
Elastic production of vector mesons $\gamma^{*} N\to V N$ is the pomeron-exchange dominated diffractive reaction with much potential of probing the BFKL pomeron. The BFKL pomeron can conveniently be described in terms of the dipole cross section which is a solution of the generalized BFKL equation. In this paper we discuss, how the energy and $Q^{2}$ dependence of elastic production of vector mesons at HERA will allow scanning the dipole cross section as a function of dipole size $r$. We show that determinaton of the intercept of the BFKL pomeron requires measuring the $\rho^{0}$ and $J/\Psi$ production at $Q^{2} \sim (100-200)GeV^2$ and/or the quasireal photoproduction of the $\Upsilon$. We present predictions for the effective intercept in the kinematic range of the forthcoming HERA experiments, which can shed much light on the nonperturbative component of the pomeron.
Nemchik Jan
Nikolaev Nikolai N.
Zakharov Bronislav G.
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