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Twist decomposition of exclusive heavy meson production cross sections

Mariusz Sadzikowski

hep-pharXiv:2609.11179

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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