# Quark Sivers Function at Small-$x$: Leading contribution from the Spin-Dependent Odderon

### Submission summary

 As Contributors: M Gabriel Santiago Arxiv Link: https://arxiv.org/abs/2108.01046v1 (pdf) Date submitted: 2021-08-03 03:25 Submitted by: Santiago, M Gabriel Submitted to: SciPost Physics Proceedings Proceedings issue: DIS2021 Academic field: Physics Specialties: High-Energy Physics - Phenomenology Approach: Theoretical

### Abstract

We present the calculation of the leading contribution to the quark Sivers function at small-Bjorken $x$. This calculation uses the high energy scattering approximation and operator formalism developed by Kovchegov and Sievert to obtain a dominant contribution to the quark Sivers function coming from the spin-dependent odderon, in agreement with the results of Dong, Zhen, and Zhou. We then calculate this dominant contribution in the diquark model of the proton to obtain a small-$x$ estimate for the Sivers function.

###### Current status:
Editor-in-charge assigned