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

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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https://hal.archives-ouvertes.fr/hal-02439997
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Submitted on : Tuesday, January 14, 2020 - 9:00:46 PM
Last modification on : Tuesday, January 21, 2020 - 9:00:13 PM

### Citation

Renaud Boussarie, Yoshitaka Hatta, Lech Szymanowski, Samuel Wallon. Probing the Sivers function with an unpolarized target: GTMD distributions and the Odderons. 2020. ⟨hal-02439997⟩

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