Twist decomposition of exclusive heavy meson production cross sections
Mariusz Sadzikowski
Abstract
We study the twist decomposition of the total cross sections for exclusive heavy vector meson electroproduction and photoproduction in the γ p processes, within the leading logarithmic 1/x BFKL formalism. The Mellin transforms of the impact factors of the vector meson are calculated. We show that the higher twist contributions are strongly suppressed in the low-x kinematical regime. Possible enhancement of the higher twists effects for nuclei targets is discussed.
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