[Hybrid baryons] Review Request: Slides for DNP
Izzy Illari
izzy at jlab.org
Mon Sep 30 10:54:54 EDT 2024
Dear RG-K Group and Hadron Spectroscopy Working Group Members,
I'm preparing for my upcoming DNP talk and would like to circulate my
slides for review. These are largely identical to those presented at the
PWA/ATHOS conference, as my recent work on detector acceptances using
simulations&GEMC isn't yet ready for external presentation.
I welcome any new comments or suggestions. For reference, I've included
my final DNP abstract below, the result of previous comments and
suggestions. Please let me know if there are any issues accessing the
slides attached to this message.
Thank you for your time and feedback.
Best regards,
Izzy
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 complimentary
tool to the more extensively studied πN system for the extraction of
resonance properties. 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.
*This work was supported by the US Department of Energy Office of
Science, Office of Nuclear Physics, under contract no. DE-SC0016583.
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