Speaker
Description
One of the primary physics goals of the future electron-ion collider (EIC) is understanding the origin of nucleon spin from measurements of polarized DIS and SIDIS. Current analyses suggest that approximately 40% of nucleon spin is carried by gluon spin, and 30% each carried by quark spin and orbital angular momentum. However, existing data only extends to $x \approx 0.01$, and model-dependent extrapolations to lower $x$ (where gluon contributions dominate) result in large uncertainties. The kinematic reach of the EIC will provide significant constraints up to two orders of magnitude lower in $x$ than existing measurements. The proposed EIC Comprehensive Chromodynamics Experiment (ECCE) detector, centered on the existing BaBar 1.4 Tesla superconducting solenoid, has demonstrated the ability to perform measurements of key observables relevant to nucleon spin. This talk will give an overview of measurements sensitive to quark and gluon spin to be carried out by ECCE, and the expected impact of this data on our theoretical understanding of the origin of nucleon spin.
| Submitted on behalf of a Collaboration? | Yes |
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