Two-pion light-cone distribution amplitudes from the instanton vacuum

Details Two-pion light-cone distribution amplitudes from the instanton vacuum Two-pion light-cone distribution amplitudes from the instanton vacuum

1998-06-16

arxiv.org/abs/hep-ph/9806390v1

Phys.Rev.D59:091502,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, LaTeX, 4 figures included using epsf

Scientific paper

10.1103/PhysRevD.59.091502

We calculate the two-pion light-cone distribution amplitudes in the effective low-energy theory based on the instanton vacuum. These generalized distribution amplitudes describe the soft (non-perturbative) part of the process $\gamma^*\gamma \to \pi\pi$ in the region where the c.m. energy is much smaller than the photon virtuality. They can also be used in the analysis of exclusive processes such as $\gamma^* p \to p + 2\pi, 3\pi$ etc.

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