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arXiv · hep-ph/9907453

Exclusive hadronization in gamma* gamma -> pi pi

M. Diehl·T. Gousset·B. Pire
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Abstract

We perform a QCD analysis of exclusive two-meson production in gamma* gamma collisions in the kinematical domain of large photon virtuality Q^2 and small hadronic invariant mass W^2. In these kinematics the amplitude factorizes into a perturbative subprocess gamma* gamma -> q qbar and a two-meson distribution amplitude. This opens the way to study new hadronic matrix elements related with the physics of hadronization and confinement.

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M. Diehl, T. Gousset, B. Pire. 1999-08-03. Exclusive hadronization in gamma* gamma -> pi pi. https://doi.org/10.1016/s0920-5632(00)00172-9

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