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arXiv · 1210.8095

Double handbag description of proton-antiproton annihilation into a heavy meson pair

A. T. Goritschnig·B. Pire·W. Schweiger
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Abstract

We propose to describe the process $ p \bar{p} \,\to\, \bar{D^0} D^0$ in a perturbative QCD motivated framework where a double-handbag hard process $ u d \bar u \bar d \to \bar{c} c$ factorizes from transition distribution amplitudes, which are quasi forward hadronic matrix elements of $Ψ_q Ψ_q Ψ_c $ operators, where q denotes light quarks and c denotes the heavy quark. We advocate that the charm-quark mass acts as the large scale allowing this factorization. We calculate this process in the simplified framework of the scalar diquark model and present the expected cross sections for the PANDA experiment at GSI-FAIR.

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A. T. Goritschnig, B. Pire, W. Schweiger. 2013-10-21. Double handbag description of proton-antiproton annihilation into a heavy meson pair. https://doi.org/10.1103/physrevd.87.014017

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