Probing the Gluon Sivers Function with an Unpolarized Target: GTMD Distributions and the Odderons
Renaud Boussarie, Yoshitaka Hatta, L. Szymanowski, S. Wallon
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.
Topics & Concepts
PhysicsGluonParticle physicsNucleonPionQuantum chromodynamicsScatteringProtonFunction (biology)Nuclear physicsElectronBiologyQuantum mechanicsEvolutionary biologyHigh-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions