Two-photon exchange corrections to the pion form factor

Details Two-photon exchange corrections to the pion form factor Two-photon exchange corrections to the pion form factor

2009-11-18

arxiv.org/abs/0911.3619v2

Phys.Rev.C81:018202,2010

Physics

Nuclear Physics

Nuclear Theory

9 pages, 4 figures, version to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.81.018202

We compute two-photon exchange corrections to the electromagnetic form factor of the pion, taking into account the finite size of the pion. Compared to the soft-photon approximation for the infrared divergent contribution which neglects hadron structure effects, the corrections are found to be < 1% for small Q^2 (Q^2 < 0.1 GeV^2), but increase to several percent for Q^2 > 1 GeV^2 at extreme backward angles.

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