[Deeppwg] Abstracts for HEPNP2025, GHP2025

[Sebastian Kuhn]

Dear all,

I have 2 (CSC-approved) invited talks pending with deadlines for abstract submission by November 30:

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  "HEPNP2025"
  Valparaiso, Chile, January 6 - 10, 2025
  https://indico.cern.ch/event/1394087/page/33066-second-circular

 "Structure Functions at large x"
Sebastian Kuhn, Old Dominion University

ABSTRACT:
Understanding nucleon structure in the valence region, where one quark carries a large fraction x of the nucleon momentum, is a fundamental goal in hadronic physics. Many models and theoretical predictions exist for the behavior of the ratio d(x)/u(x) of up over down quark densities and the intrinsic polarization of up and down quarks inside a polarized nucleon as x approaches x=1. Exploring this regime is one of the central experimental goals of the energy-upgraded CEBAF accelerator at Jefferson Lab. I will present an overview of this experimental program, with an emphasis on recent measurements with the CLAS12 spectrometer in Hall B of Jefferson Lab.
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  "11th workshop of the APS Topical Group on Hadronic Physics"
  Anaheim, CA, USA, March 14 - 16, 2025
  https://indico.jlab.org/event/868/

 "Nucleon structure in the extreme valence region"
Sebastian Kuhn, Old Dominion University

ABSTRACT:
Measuring parton distribution functions (PDFs) in the valence region at high Bjorken-x is one pillar of the experimental program of Jefferson Lab at 12 GeV.
I will review the status of our knowledge of polarized and unpolarized nucleon structure functions at very high x. I will especially focus on the recent “BONuS12” experiment with CLAS12 at Jefferson lab to measure the ratio F2n/F2p of neutron to proton unpolarized structure functions, and provide a first glimpse of the data on spin structure functions accumulated through the RG-C experiment with CLAS12.

—

We have already presented the BONuS12 results in the DPPWG meeting during the past CLAS Collaboration meeting, and we are requesting a data release (hopefully that can be scheduled for the December 5 DPPWG meeting). Any data from RG-C will be very preliminary (similar to what was shown for the PAC52 jeopardy review) and will have a big stamp “PRELIMINARY” across.

Please let me know if you have any comments/concerns. - Sebastian
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