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Probing partonic structure in gamma* gamma -> pi pi near threshold

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arxiv hep-ph/9805380 v1 pith:RX5C6FIX submitted 1998-05-19 hep-ph

classification hep-ph
keywords gammapairpartonicphotonamplitudesbehaviorcaseconvolution
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Hadron pair production gamma* gamma -> h hbar in the region where the c.m. energy is much smaller than the photon virtuality can be described in a factorized form, as the convolution of a partonic handbag diagram and generalized distribution amplitudes which are new non-perturbative functions describing the exclusive fragmentation of a quark-antiquark pair into two hadrons. Scaling behavior and a selection rule on photon helicity are signatures of this mechanism. The case where h is a pion is emphasized.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Revealing chiral-odd two-meson generalized distribution amplitudes in $e^- e^+ \to (\pi \pi) (\pi \pi)$ reactions

    hep-ph 2025-07 unverdicted novelty 7.0 of 10

    The paper proposes using two-photon exchange interference in e+e- to (pi pi)(pi pi) to access chiral-odd dimeson GDAs that encode spin-orbit correlations in spin-zero mesons.

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