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Exploring a Fixed-Target Program at the EIC: Feasibility and Physics Opportunities

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C-120 (Stony Brook University/Online)

C-120

Stony Brook University/Online
Description

FIxed-target eXperiment at EIC (FIXE) initiative

This event may be attended in person, or virtually using Zoom: https://stonybrook.zoom.us/j/96801124083?pwd=oWRcNbjOr1OfRJ0uB2D9Pij3bAAMj0.1

This is a CFNS Ad-Hoc Meeting. See the CFNS conferences page for other events.

This workshop aims to evaluate the physics potential and technical feasibility of implementing a fixed-target program at the future Electron-Ion Collider (EIC). Inspired by successful initiatives such as SMOG2 at LHCb and the STAR fixed-target program at RHIC, we propose to explore how such a setup could complement the collider mode and significantly broaden the EIC’s scientific reach.

A fixed-target configuration would provide unique access to poorly explored regions of QCD: high Bjorken-x, low Q^2, exclusive and diffractive processes, cold nuclear matter effects, and hadronization at large x. It would also enable studies with polarized and nuclear targets, and open the door to heavy-ion collisions (A+A') at EIC energies, complementing the RHIC Beam Energy Scan.

 

In addition to its impact on nuclear and particle physics, such a program could deliver valuable data for space radiation research, particularly through precise cross-section measurements relevant to cosmic-ray interactions—building on experience from target-wire experiments at RHIC.

The workshop will bring together experts in accelerator design, detector integration, and QCD theory to assess the physics case, target technologies (storage cells, wire targets), and integration challenges. The goal is to evaluate the viability and benefits of adding a fixed-target mode to the EIC’s capabilities.

 

List of Organizers

  • Daniel Cebra, University of California at Davis, USA

  • Matt Durham, Los Alamos National Laboratory, USA

  • Charles-Joseph Naïm, Stony Brook University, USA (CFNS local organizer)

  • Ramona Vogt, Lawrence Livermore National Laboratory & University of California at Davis, USA

 

This workshop is hosted at and supported by

Contacts
Registration
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Participants
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  • Mon, September 29
    • 8:30 AM → 8:40 AM
      Welcome
    • 8:40 AM → 9:00 AM
      FIxed-target eXperiment at EIC (FIXE) initiative 20m
      Speaker: Charles-Joseph NAÏM (Stony Brook University (CFNS))
      Welcome_FT@EIC.pdf
    • 9:00 AM → 10:30 AM
      Physics motivations
      • 9:00 AM
        What can we learn from a Z/A scan? 30m
        Speaker: Jaki Noronha-Hostler (University of Illinois Urbana-Champaign)
        ZAscan.pdf
      • 9:30 AM
        Nuclear data and applications of a fixed-target program 30m
        Speaker: David Brown (BNL)
      • 10:00 AM
        Physics Motivation for an EIC fixed target program from the STAR BES perspective 30m
        Speaker: Helen Caines (Yale University)
        CainesBES.pdf
    • 10:30 AM → 11:00 AM
      Coffee break
    • 11:00 AM → 12:40 PM
      Physics motivations
      • 11:00 AM
        NASA/cosmic ray nuclear data 30m
        Speaker: Ramona Vogt (LLNL and UC Davis)
        NDforEIC_FXT.pdf
      • 11:30 AM
        From Ultra-Peripheral to Fixed-Target: Low-Energy Photonuclear Physics at the EIC 30m
        Speaker: Daniel Brandenburg (Ohio State University)
        09_sept_29_FIXE_jdb.pdf
      • 12:00 PM
        Jefferson Lab: Present and Future 30m
        Speaker: Patrizia Rossi (Jefferson Lab)
        Rossi_SBU.pdf
    • 2:00 PM → 3:00 PM
      Target
      • 2:00 PM
        Unpolarized and polarized high-density gas target at the LHC 30m
        Speaker: Pasquale Di Nezza (INFN Frascati)
        FIXE 2025 - DiNezza.pdf
      • 2:30 PM
        Consideration of a polarized internal gas target experiment at the EIC Electron Storage Ring 30m
        Speaker: Richard Milner (MIT)
        Fixed_targ.pdf
    • 3:00 PM → 3:30 PM
      Coffee break
    • 3:30 PM → 4:00 PM
      Target
    • 4:00 PM → 4:30 PM
      Detector Design
      • 4:00 PM
        How can one integrate a fixed target in ePIC and EIC project status 30m
        Speaker: Elke-caroline aschenauer (BNL)
        EIC.ePIC.FixedTarget.pptx
    • 4:30 PM → 5:30 PM
      Roundtable Discussion
  • Tue, September 30
    • 9:00 AM → 9:30 AM
      Target
      • 9:00 AM
        Perspectives of polarized internal target experiments using the EIC beams 30m
        Speaker: Bogdan Wojtsekhowski (Jefferson Lab)
        Heracles-BW-2025.pdf
    • 9:30 AM → 10:00 AM
      Detector Design
      • 9:30 AM
        A fixed-target at EIC: what can we learn? 30m
        Speaker: Charles-Joseph NAÏM (Stony Brook University (CFNS))
        FT@EIC.pdf
    • 10:00 AM → 10:30 AM
      Coffee break
    • 10:30 AM → 11:30 AM
      Physics motivations
      • 10:30 AM
        Fixed target experiments at the EIC: a heavy ion perspective 30m
        Speaker: Christine Nattrass (University of Tennessee)
        Nattrass.pdf
      • 11:00 AM
        Fixed-Target Proton–Nucleus at Intermediate Energies: Highlights, Lessons, and Next Steps 30m
        Speaker: Dr Niseem (Magdy) Abdelrahman (Texas Southern University)
        Talk__Sep_30.pdf
    • 11:30 AM → 12:30 PM
      Roundtable Discussion
    • 1:30 PM → 2:30 PM
      Beam
    • 2:30 PM → 3:00 PM
      Coffee break
    • 3:00 PM → 4:00 PM
      Roundtable Discussion: Future perspectives
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