[Clas_hadron] [EXTERNAL] Re: Abstract for DNP

[Bill Briscoe]

An abstract submitted via the APS meeting page will cut off if the abstract
is too long. This is too long. Please do a test run without submitting the
abstract and prune it down.

Bb

On Tue, Jun 25, 2024, 19:00 Izzy Illari <iti2103 at gwmail.gwu.edu> wrote:

> Dear RG-K Group and HSWG Members,
>
> I hope this email finds you well.
>
> I have been encouraged by RG-K group to submit an abstract for the
> upcoming DNP October 7-10. The abstract is identical to the one I presented
> at the PWA/ATHOS conference in May, which has already been previously
> circulated to the HSWG.
>
> For your convenience, I have copied the abstract again down below. The
> abstract submission deadline is 8 July 2024.
>
> I would appreciate any feedback or suggestions you may have regarding the
> abstract.
>
> Thank you and all the best,
> Izzy
>
> Exclusive $\eta$ Electro-Production Beam Spin Asymmetry Measurements using
> CLAS12 at Jefferson Lab
>
> The exploration of nucleon structure and electromagnetic transitions from
> ground state to excited state is a cornerstone of nuclear physics research.
> Meson electro-production experiments have opened new avenues for
> investigating these phenomena, particularly in the 12 GeV era at Jefferson
> Lab with the CLAS12 spectrometer. The $\eta N$ final states, accessible
> only through isospin $I = 1/2$ resonances, provide a unique tool for
> studying nucleon excitations. By simplifying the analysis and enabling a
> cleaner extraction of resonance properties compared to the extensively
> studied $\pi N$ final states, $\eta$ electro-production offers a
> complementary approach to unraveling the structure of excited nucleons.
> This work presents the first-ever measurement of the beam spin asymmetry
> (BSA) in exclusive $\eta$ electro-production, covering a previously
> unexplored kinematic region with $1.6 \leq W \leq 2.2$ GeV. The BSA is
> extracted from the CLAS12 data using a comprehensive analysis framework
> that carefully considers the statistical limitations of the data set. The
> results are compared to predictions from theoretical models, such as the
> J"{u}lich-Bonn-Washington (JBW) and MAID, as well as compared to previously
> published cross-section and spin observable results from CLAS, and SLAC.
> Notably, the extracted BSA exhibits discrepancies with the model
> predictions, highlighting the potential for refining theoretical
> descriptions of nucleon resonances and their electromagnetic couplings
> through the incorporation of these new data. The high-precision data
> obtained in this previously unmeasured kinematic region now serve as
> valuable input for theorists to refine their models.
>
> --
> Izzy Illari
> Pronouns: They/Them
>
> M.Phil. in Physics | The George Washington University, 2022
> Graduate Certificate in Data Science | The George Washington University,
> 2021
> M.S. in Physics | The George Washington University, 2020
> B.A. in Physics | Barnard College, Columbia University, 2017
>
> GWU: iti2103 at gwmail.gwu.edu | JLab: izzy at jlab.org
>
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