Axial meson contribution to proton form factors

Nikolai Korchagin; Andrey Radzhabov

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arXiv · 2106.06883

Axial meson contribution to proton form factors

Nikolai Korchagin·Andrey Radzhabov

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Abstract

The effect of axial meson exchange on extraction of proton electromagnetic form factors in $ep$ scattering is calculated. Taking as an example $f_1(1285)$ meson exchange, it is quantitatively shown how it affects Rosenbluth and polarization transfer methods. The contribution of an axial meson is negligible in comparison with the traditional box-type two photon exchange and could not be responsible for difference of form factors extracted by different techniques. However, results support the idea that meson exchange could explain deviation of individual polarizations.

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Nikolai Korchagin, Andrey Radzhabov. 2021-06-12. Axial meson contribution to proton form factors. https://arxiv.org/abs/2106.06883

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