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arXiv · 1912.08182

Probing the Sivers function with an unpolarized target: GTMD distributions and the Odderons

Renaud Boussarie·Yoshitaka Hatta·Lech Szymanowski·Samuel Wallon
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Abstract

It is commonly believed that the Sivers function has uniquely to do with processes involving a transversely polarized nucleon. In this paper we show that it is not necessarily the case. We demonstrate that exclusive pion production in $un$polarized electron-proton scattering in the forward region is a direct probe of the gluon Sivers function due to its connection to the QCD Odderon.

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Renaud Boussarie, Yoshitaka Hatta, Lech Szymanowski, Samuel Wallon. 2019-12-17. Probing the Sivers function with an unpolarized target: GTMD distributions and the Odderons. https://doi.org/10.1103/physrevlett.124.172501

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