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J/Psi and Beyond

L102 (Jefferson Lab)


Jefferson Lab

Ed Brash (Christopher Newport University), Ian Cloet (Argonne National Laboratory), Jianwei Qiu (Jefferson Lab), Patrizia ROSSI (JEFFERSON LAB), Zein-Eddine Meziani (Argonne National Laboratory)

Measurements of J/psi near threshold with high statistics, for both electro and photoproduction at JLab with 12 GeV beam, has created tremendous interest in the community.  A CEBAF energy increase (to ~24 GeV) will allow us to ask new questions and provide opportunities for addressing long-standing puzzles in nuclear and particle physics, thus enhancing the physics output of all four experimental halls, using existing (Halls B, C, and D) and future (SoLID in Hall A) equipment.  This focused one-day workshop aims to (1) identify the key new measurements which could be made possible via an energy increase, and (2) specify the corresponding new questions that could be answered and the outstanding puzzles that could be addressed.  For example, what is the impact of Psi(2S) data near and above its threshold in exploring the size change of the probe through a comparison with the threshold J/psi production data?  With the enhanced Q lever-arm in J/psi electro-production that comes with higher energy beam, do we expect an improvement in probing the trace anomaly (which is central to the origin of proton mass)? Does having the J/psi produced precisely, especially with 19-20 GeV beam, help to address the tension that currently exists between JLab data and SLAC data from 40 years ago?

Please Register to Attend Here

Zoom Link Day#1 Here

Password: 638644

Zoom Link Day#2 Here

Password: 370164


  • Tuesday, 16 August
    • 08:50 09:00
      Welcome 10m
      Speaker: David Dean (TJNAF)
    • 09:00 09:40
      What can be done with 17 and 20+ GeV in the electro- and photo-production of J/Psi and psi’ near threshold with SoLID? 40m
      Speaker: Sylvester Joosten (Argonne National Laboratory)
    • 09:40 10:20
      What can a modified CLAS12 configuration do to study J/Psi with high luminosity experiments at 20+ GeV? 40m
      Speakers: Dr Rafayel Paremuzyan (Jefferson Lab), Stepan Stepanyan (Jefferson Lab)
    • 10:20 11:00
      New opportunities for J/Psi photoproduction studies in Hall D with the CEBAF upgrade 40m
      Speaker: Lubomir Pentchev (Jefferson Lab)
    • 11:00 11:20
      Coffee Break 20m
    • 11:20 12:00
      QCD analysis of near-threshold quarkonium leptoproduction at large photon virtualities 40m
      Speaker: Yoshitaka Hatta (Brookhaven National Laboratory)
    • 12:00 12:40
      J/Psi near threshold in holographic QCD: A and D gravitational Form Factors 40m
      Speakers: Kiminad Mamo (Argonne National Laboratory), ismail zahed (stony brook university)
  • Wednesday, 17 August
    • 09:00 09:40
      QCD analysis of near-threshold photon-proton production of heavy quarkonium – extraction of gluonic EMT 40m
      Speaker: Xiangdong Ji (U. Maryland)
    • 09:40 10:20
      TBA 40m
      Speaker: Jianwei Qiu (Jefferson Lab)
    • 10:20 11:00
      One slide presentations 40m
    • 11:00 11:30
      Coffee Break 30m
    • 11:30 12:30
      Discussion and initial writing of white paper 1h