Impact Representation of Generalized Distribution Amplitudes

Details Impact Representation of Generalized Distribution Amplitudes Impact Representation of Generalized Distribution Amplitudes

2002-12-19

arxiv.org/abs/hep-ph/0212296v2

Phys.Lett. B556 (2003) 129-134

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages LATEX, 3 .eps figures; final version to be published in Phys Lett. B. Some minor changes and some references added

Scientific paper

10.1016/S0370-2693(03)00134-5

We develop an impact representation for the generalized distribution amplitude which describes the exclusive hadronization of a quark-antiquark pair to a pair of mesons. Experiments such as gamma^* gamma -> pi pi and gamma^* N -> pi pi N' are shown to probe the transverse size of the hadronization region of the quark antiquark pair that one can interpret as the transverse overlap of the two emerging mesons. An astonishing feature of this description is that low energy pi pi phase shift analysis can be used for understanding some properties of quark hadronization process.

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