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Towards improved hadron femtography with hard exclusive reactions, edition IV, Jefferson Lab, 2025

→ America/New_York
Alexandre Camsonne (JLab), Charlotte Van Hulse, Jianwei Qiu (JLab), Latifa Elouadrhiri (JLab), Marie Boër (Virginia Tech)
Description

This workshop is the fourth edition of the series, for which previous editions took place at Virginia Tech (2022), JLab (2023) and ECT* Trento (2024). We are welcoming you for this fourth edition at Jefferson Lab from July 28th-31st, 2025.

Our goal is to bring together theorists and experimentalists in hadronic physics to discuss recent progress and directions to improve our knowledge of hard exclusive reactions and interpretations such as hadron imaging. Each year emphasizes a "special topic" to which we are dedicating a full day and extra discussions. This year, we are particularly interested in fits and global simulations. We will discuss how to extract objects such as generalized parton distributions (GPDs) and gravitational form factors (GFFs).

Besides fits sensitve to GPDs and simulations, we will also discuss, among physics topics, Compton-like reactions (DVCS, TCS...), hard exclusive meson production, exclusive associated meson production, and exclusive studies in ultra-peripheral collisions. 

The workshop will take place in person at Jefferson Lab. Remote attendance is possible as an audience but we ask for all presentations to be in-person.

We will have a round table on a dedicated topic at the end of each day.

We encourage all those interested in this workshop to submit an abstract (deadline July 3d, 2025). Note that we are introducing this year a poster session for junior participants. Please encourage your students to attend! 

Sessions:

  1. QCD fits
  2. Software and simulations
  3. Hard exclusive meson production with one or more meson(s)
  4. GPD formalism in DVCS
  5. DVCS and DDVCS
  6. GFFs, proton mass and pressure
  7. Exclusive physics at high-energy colliders and experimental facilities
  8. Ultra Peripheral Collisions
  9. Lattice QCD

Organization: scientific sessions, round tables, poster session. 

 

Zoom Meeting ID: 867 5547 1795 Passcode: 608737
Registration
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Participants
  • Adam Freese
  • Alexandre Camsonne
  • Andrei Afanasev
  • Andrey Kim
  • Arna Ma
  • Atharva Naik
  • Bhawani Singh
  • Bishnu Pandey
  • Bobae Kim
  • Bogdan Wojtsekhowski
  • Brandon Kriesten
  • Brean Maynard
  • Charlotte Van Hulse
  • Christian Weiss
  • Daniel Tapia Takaki
  • Debaditya Biswas
  • Donavan Ebersole
  • Eric Voutier
  • Fatma Aslan
  • Goran Duplancic
  • Gyang Chung
  • Hamlet MKRTCHYAN
  • Harut Avagyan
  • Henry Klest
  • Ho-Yeon Won
  • Huachen Sun
  • Jakob Schoenleber
  • Jianwei Qiu
  • Jihee Kim
  • Joshua Artem Tan
  • Julie Roche
  • Julie Roche
  • Jun-Young Kim
  • Karolina Lavickova
  • Kemal Tezgin
  • Ken Nishida
  • Kiminad Mamo
  • Laura Biven
  • Leonard Gamberg
  • Lubomir Pentchev
  • Maggie Kerr
  • Mahmoud Gomina
  • Marat Siddikov
  • Marie Boër
  • Martha Constantinou
  • Matthew Green
  • Melany Higuera-Angulo
  • Michael Engelhardt
  • Mitchell Kerver
  • Muhammad Junaid
  • Natsuki Tomida
  • Nobuo Sato
  • Noémie Pilleux
  • Peter Schweitzer
  • Rafayel Paremuzyan
  • Richard Whitehill
  • Saad Nabeebaccus
  • Saraswati Pandey
  • Shelby Arrigo
  • Shohini Bhattacharya
  • Valery Kubarovsky
  • Vardan Tadevosyan
  • Victor Martinez-Fernandez
  • Volker Burkert
  • XIANG Gao
  • Xiangdong Ji
  • Yaohang Li
  • Yijie Wang
  • Yong Zhao
  • Zaki Panjsheeri
  • Zakia Sultana Tithi
  • Zhite Yu
  • Zhiwan Xu
  • Zhiwen Zhao
  • Zhongling Ji
  • Zichen Yin
  • Monday, July 28
    • 8:20 AM → 8:45 AM
      Badge and Welcome
    • 8:45 AM → 9:15 AM
      Introduction by JLab Management
      Convener: David Dean
    • 9:15 AM → 11:00 AM
      Lattice: Studies of the nucleon with GPDs, TMDs, FFs... on lattice
      Convener: Kiminad Mamo
    • 11:00 AM → 11:30 AM
      coffee break 30m
    • 11:30 AM → 12:25 PM
      Lattice: lattice + AI
      Convener: Jakob Schoenleber
    • 12:25 PM → 1:30 PM
      lunch break 1h 5m
    • 1:30 PM → 3:10 PM
      DVCS & GPDs: QCD formalism
      Convener: Yong Zhao
    • 3:10 PM → 3:40 PM
      coffee break 30m
    • 3:40 PM → 4:45 PM
      DVCS & GPDs: GFFs
      Convener: Charlotte Van Hulse
    • 4:45 PM → 5:30 PM
      Round Table: Lattice QCD, formalism of QCD and GFFs
      Conveners: Michael Engelhardt, Xiangdong Ji
      slides
    • 5:30 PM → 6:30 PM
      Social: Reception and Poster Session
      Conveners: Arna Ma, Gyang Chung, Ken Nishida, Mahmoud Gomina, Matthew Green, Zaki Panjsheeri
  • Tuesday, July 29
  • Wednesday, July 30
    • 9:00 AM → 11:05 AM
      Simulations, software, fits (special topic): computing methods & general
      • 9:00 AM
        Data and computing systems 50m
        Speaker: Laura Biven
      • 9:50 AM
        Reconstructing GPDs using pixel based approach 25m
        Speaker: Nobuo Sato
      • 10:15 AM
        GUMP 25m
        Speaker: Fatma Aslan
      • 10:40 AM
        GFFs from Gradient-Flow-Based Renormalization of the QCD EMT 25m
        Speaker: Xiang Gao
    • 11:05 AM → 11:25 AM
      coffee break 20m
    • 11:25 AM → 12:40 PM
      Simulations, software, fits (special topic): Linking GPDs and TMDs + Positrons
      Convener: Henry Klest
      • 11:25 AM
        The transverse momentum dependence of unpolarized observables in SIDIS @ NLP 25m
        Speaker: Leonard Gamberg
      • 11:50 AM
        Separating longitudinal and transverse photon contributions in electroproduction 25m
        Speaker: Harut Avakian
      • 12:15 PM
        Exclusive production of pions at COMPASS to study GPDs 25m
        Speaker: Karolina Lavickova (Czech Technical University in Prague)
    • 12:40 PM → 2:00 PM
      lunch break 1h 20m
    • 2:00 PM → 3:40 PM
      Simulations, software, fits (special topic): fits/anaylsis
      Convener: Nobuo Sato
      • 2:00 PM
        Extrapolations between calculations and lattice QCD 25m
        Speaker: Brandon Kriesten
      • 2:25 PM
        Form Factors extraction 25m
        Speaker: Melany Higuera
      • 2:50 PM
        likelihood analysis for new DVCS fits 25m
        Speaker: Douglas Adams
      • 3:15 PM
        Extracing GPDs from DVCS 25m
        Speaker: Zhite Yu
    • 3:40 PM → 4:00 PM
      coffee break 20m
    • 4:00 PM → 5:15 PM
      Simulations, software, fits (special topic): software/ generators
      • 4:00 PM
        QCD First Inverse problem using Maximum Likelihood Analysis via Exclusive Reactions 25m
        Speaker: Saraswati Pandey
      • 4:25 PM
        software framework for exclusive reactions and event generators 25m
        Speaker: Kemal Tezgin
      • 4:50 PM
        Exclusive processes in the PARTONS computational framework 25m
        Speaker: Victor Martinez
    • 5:15 PM → 6:00 PM
      Round Table: Fits and use of novel computing methods
      Conveners: Kemal Tezgin, TBD
      slides
  • Thursday, July 31
    • 9:00 AM → 10:40 AM
      Mass & pressure of the nucleon
      Convener: Brandon Kriesten
      • 9:00 AM
        Pressure inside hadrons 25m
        Speaker: Peter Schweitzer
      • 9:25 AM
        A realist perspective on proton pressure 25m
        Speaker: Adam Freese
      • 9:50 AM
        Relativistic spatial distributions: energy-momentum tensor in polarized nucleons 25m
        Speaker: Ho-Yeon Won
      • 10:15 AM
        D-term 25m
        Speaker: Brean Meynard
    • 10:40 AM → 11:10 AM
      coffee break 30m
    • 11:10 AM → 12:25 PM
      DVCS
      Convener: Rafayel Paremuzyan
      • 11:10 AM
        DVCS at JLab Hall C 25m
        Speaker: Julie Roche
      • 11:35 AM
        DVCS with CLAS12 using ALERT 25m
        Speaker: Noémie Pilleux
      • 12:00 PM
        photon polarimetry for DVCS 25m
        Speaker: Bogdan Wojtsekhowski
    • 12:25 PM → 1:45 PM
      lunch break 1h 20m
    • 1:45 PM → 3:25 PM
      GPD formalism
      Convener: Zhite Yu
      • 1:45 PM
        Transversity GPDs 25m
        Speaker: Jun-Young Kim
      • 2:10 PM
        Factorization of GPDs at large momentum transfer t 25m
        Speaker: Jakob Schoenleber
      • 2:35 PM
        Small-x asymptotics of GPDs 25m
        Speaker: Brian Sun
      • 3:00 PM
        GPDs at J-PARC 25m
        Speaker: Natsuki Tomida
    • 3:25 PM → 3:55 PM
      coffee break 30m
    • 3:55 PM → 5:10 PM
      DDVCS
      Convener: Victor Martinez
      • 3:55 PM
        Double deeply virtual Compton scattering with SoLID in Hall A 25m
        Speaker: Eric Voutier
      • 4:20 PM
        DDVCS with CLAS12 in Hall B at JLAB 25m
        Speaker: Rafayel Paremuzyan
      • 4:45 PM
        TCS and DDVCS with a dedicated setup in Hall C at JLab 25m
        Speaker: Debaditya Biswas
    • 5:10 PM → 5:55 PM
      Round Table: Compton-like reactions / Mass & pressure inside the nucleon
      Conveners: Adam Freese, Eric Voutier
      slides
    • 5:55 PM → 6:00 PM
      Closeout
      Convener: Organizers
  • Friday, August 1
    • 10:30 AM → 12:00 PM
      Open to everybody + organizers: What next?

      Discussion for next edition of the workshop: where and what topic to emphasize next time

      Summary of all the workshop - discussions

      • 10:30 AM
        Open discussion about the future of this workshop and summary 1h 30m
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