Probing the Gluon Sivers Function with an Unpolarized Target: GTMD Distributions and the Odderons

Open Access

Probing the Gluon Sivers Function with an Unpolarized Target: GTMD Distributions and the Odderons

Renaud Boussarie, Yoshitaka Hatta, Lech Szymanowski, and Samuel Wallon

Phys. Rev. Lett. 124, 172501 – Published 29 April 2020

Abstract

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

Received 4 February 2020
Revised 26 March 2020
Accepted 14 April 2020

DOI:https://doi.org/10.1103/PhysRevLett.124.172501

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Perturbative QCD

Particles & Fields

Authors & Affiliations

Renaud Boussarie¹, Yoshitaka Hatta ¹, Lech Szymanowski ², and Samuel Wallon^3,4

¹Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
²National Centre for Nuclear Research (NCBJ), Pasteura 7, 02-093 Warsaw, Poland
³Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
⁴Sorbonne Université, Faculté de Physique, 4 place Jussieu, 75252 Paris Cedex 05, France