[Clas_hadron] [EXTERNAL] Re: Abstract for DNP

[Izzy Illari]

Dear RG-K Group and HSWG Members,

I hope this email finds you well. I'm writing to follow up on my previous communication regarding the abstract submission for the DNP.

Following feedback and adhering to the APS DNP guidelines, I have revised the abstract to meet the 1300 character limit. Please find the updated abstract below:

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 ηN final states, accessible only via 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 πN final states, η electro-production offers a complementary approach. This work presents the first-ever measurement of the beam spin asymmetry (ALU) in exclusive η electroproduction, covering a previously unexplored kinematic region with 1.6 ≤ W ≤ 2.2 GeV. ALU is determined from the CLAS12 data using an analysis framework that considers the statistical limitations of the data set. Results are compared to theoretical models Jülich-Bonn-Washington and EtaMAID. ALU exhibits discrepancies with model predictions, highlighting the potential for refining theoretical descriptions of nucleon resonances and their electromagnetic couplings. These new results in a previously unmeasured kinematic region provide valuable input for future theoretical developments.

Thank you for your time and input. I appreciate any additional feedback or suggestions you may have on this revised version.

All the best,
Izzy

On Jun 25, 2024, 7:04 PM, at 7:04 PM, Bill Briscoe <briscoe at gwu.edu> wrote:
>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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