Vector Quarkonia and Pressure Gauges

Mar 26, 2026, 7:00 AM → Mar 27, 2026, 5:00 PM US/Eastern

CEBAF Center Rm. L102 & Zoom (Jefferson Lab)

Adam Freese (Jefferson Lab), Jia-Yue Zhang (Jefferson Lab), Jianwei Qiu (Jefferson Lab), Latifa Elouadrhiri (Jefferson Lab)

The Center for Nuclear Femtography (CNF) and Theory Center mini-workshop, Vector Quarkonia as Pressure Gauges, will take place at Jefferson Lab from March 26-27, 2026.

The goal of this mini-workshop is to bring together experimentalists and theorists to discuss how vector quarkonium production can be used to probe the mechanical structure of the proton. We will review the state of the art in techniques and explore what is needed to make these measurements a success. Discussions will include:

• Theorists: Improving factorization frameworks
• Phenomenologists: Better uncertainty quantification in mock-data fits
• Experimentalists: Planning experiments and facilities requirements
• …and any other topics that naturally arise during the workshop. 

 

The workshop will feature several sessions of half-hour talks with extended discussion periods.

Special Highlight: CNF Seminar by Yoshitaka Hatta

As part of the mini-workshop program, there will be an hour-long CNF seminar by Yoshitaka Hatta (Brookhaven National Laboratory), scheduled for the afternoon of March 26. This seminar will provide key insights and context to guide the discussions throughout the workshop.

We anticipate concluding the workshop by 4:00 PM on March 27.

The mini-workshop will be hybrid, with both in-person and online participation. While we strongly encourage attending in person at Jefferson Lab, you are welcome to present your work and join discussions via Zoom. 

Thu, March 26

Welcome and introcuction

1 Welcome to the Center for Nuclear Femtography

Speaker: Latifa Elouadrhiri (Jefferson Lab)

2 Welcome to the Theory Center

Speaker: Jianwei Qiu (Jefferson Lab)

3 Introduction and Goals of the Workshop

Speaker: Adam Freese (Jefferson Lab)

Experiment: Overiew

4 Pressure and forces in the proton: what we have learned from experiment

Speaker: Volker Burkert (Jefferson Lab)

5 Threshold charmonium production with GlueX

Speaker: Lubomir Pentchev (Jefferson Lab)

10:30 AM Coffee Break

Experiment: Latest results I

6 Measurement of the near-threshold J/ψ photoproduction cross section on Hydrogen with the CLAS12

Speaker: Dr Rafayel Paremuzyan (Jefferson Lab)

Theory: Processes

7 Amplitude analyses of near threshold J/psi photoproduction

Speaker: Arkaitz Rodas (ODU/Jefferson Lab)

8 Discussion

12:30 PM Lunch

CNF Seminar: Yoshitaka Hatta

9 Gravitational form factors of nucleon and nuclei: theory calculations and experimental prospects

Speaker: Yoshitaka Hatta (Brookhaven National Laboratory)

3:00 PM Coffee Break

Theory: Mechanical properties

10 Transition GPDs and mechanical properties of excited baryons

Speaker: Christian Weiss (Jefferson Lab)

Experiment: Latest results II

11 Update on DVCS Compton Form Factor fitting with PARTONs package

Speaker: Dr Mariana Khachatryan (Florida International University)

12 Light vector meson photoproduction from nuclear targets in the energy range 6 to 10.5 GeV

Speaker: Bo Yu (Duke University)

13 Discussion

Fri, March 27

Experiment: Preliminary and Prospective measurements

14 J/ψ production at CLAS12

Speaker: Richard Tyson (Jefferson Lab)

15 Preliminary results on J/ψ electroproduction cross-sections at CLAS12

Speaker: Mariana Tenorio Pita (Old Dominion University)

16 Exclusive ϕ electroproduction on proton with CLAS12

Speaker: Bhawani Singh (Jefferson Lab)

10:30 AM Coffee Break

Phenomenology: Global Analysis

17 Electroproduction of phi towards the Strangeness D-term

Speaker: Henry Klest (Argonne National Laboratory)

18 TBD

Speaker: Isela Melany Higuera Angulo (IFM - UMSNH)

19 Proton tomography with global analysis of generalized parton distributions

Speaker: Yuxun Guo (Lawrence Berkeley National Lab)

12:30 PM Lunch

Theory: Calculations

20 Learning Proton Structure with Gaussian Processes

Speaker: Joe Karpie

21 Mellin moments from Lattice QCD: Gravitational Form Factors and Beyond

Speaker: Dimitra Pefkou (MIT)

22 Nucleon Gravitational Form Factors: Theory, Computation, and Experimental Extraction

Speaker: Kiminad Mamo (William and Mary)

23 Discussion