# 25th International Workshop on Deep Inelastic Scattering and Related Topics

Apr 3 – 7, 2017
University of Birmingham
Europe/London timezone

## Deuteron spin structure in inclusive and tagged spectator processes in the virtual nucleon approximation

Apr 6, 2017, 11:00 AM
20m
Nuffield Building G13

#### Nuffield Building G13

WG6) Spin and 3D Structure

Wim Cosyn

### Description

We discuss a model based on the virtual nucleon approximation used to describe DIS from a polarized deuteron. As the deuteron is a spin 1 hadron, it gives rise to additional observables compared to the spin 1/2 nucleon that provide new opportunities for spin studies.
For inclusive processes we concentrate on the $A_{zz}$ observable which can be connected to the tensor $b_1$ structure function. We discuss the importance of higher twist contributions in Hermes and Jlab12 kinematics and show estimates for the effect of nuclear final-state interactions.
For tagged spectator processes, we derive the general form of the SIDIS cross section for a polarized spin 1 target. Through the technique of "pole extrapolation", this process could enable high-precision, model independent extraction of neutron (spin) structure at an electron-ion collider with polarized deuteron beams. Simulations are shown that support this.

Wim Cosyn