ECCE Public Announcements

["Lajoie, John G [PHYSA]" <lajoie AT iastate.edu>]

Hi Tyler,

 

One suggestion –

 

“The kinematic reach of the EIC will provide significant constraints up to two orders of magnitude lower *in x*than existing measurements.”

 

When I read it through it wasn’t clear what the “two orders of magnitude” referred to.

 

John

 

From: Ecce-eic-public-l <ecce-eic-public-l-bounces AT lists.bnl.gov> On Behalf Of Tyler Kutz via Ecce-eic-public-l
Sent: Thursday, February 17, 2022 7:48 AM
To: ecce-eic-public-l AT lists.bnl.gov
Subject: [Ecce-eic-public-l] ECCE spin physics abstract for DIS2022

 

Hi all,

 

I was asked by the physics convenors to submit an abstract on spin physics with ECCE to DIS2022.  Please see my draft below this email.  Any comments or suggestions (before the submission deadline of February 20) are appreciated.

 

Best,
Tyler

 

***

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 spins and orbital angular momentum.  However, existing data only extends to x ~ 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 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 the spin physics measurements to be performed by ECCE, and the expected impact of this data on our theoretical understanding of the origin of nucleon spin.

***