EIC-Asia Workshop on QCD and Hadron Structure

Asia/Taipei
Meeting Room, 5F, New Phys Bldg (Institute of Physics, Academia Sinica)

Meeting Room, 5F, New Phys Bldg

Institute of Physics, Academia Sinica

No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
C.-J. David Lin (Institute of Physics, National Yang Ming Chiao Tung University), Chia Ming Kuo (National Central University, Taiwan), Jen-Chieh Peng (University of Illinois at Urbana-Champaign), Po-Ju Lin (National Central University), Wen-Chen Chang (Institute of Physics, Academia Sinica)
Description

The electron-ion collider will significantly enhance our understanding of hadron structure.  This workshop aims to bring together experts in experiments, phenomenology and lattice calculations that are relevant to this subject.  In addition to invited presentations, we may be able to accommodate a few contributed talks with priority given to junior reseachers.

Registration deadline: The 20th of April 2026

Abstract submission deadline: The 14th of April 2026

Topics include

     Lattice QCD and hadron structure

     Probing meson and nucleon structures at EIC

     Forward physics at EIC
 
     Instrumentation for forward physics at EIC
 

Invited speakers include

     Canstantia Alexandrou (The Cyprus Institute); remote

     Wen-Chen Chang (Academia Sinica)

     Luigi Del Debbio (U. of Edinburgh)

     Tanja Horn (Catholic U. America)

     Zhongbo Kang (UCLA); remote

     Yang Li (USTC); remote

     Tianbo Liu (Shandong U.); remote

     Valentin Moos (National Yang Ming Chiao Tung U.)

     Michael Murray (U. of Kansas); remote

     Robert Perry (MIT)

     Alberto Ramos (U. of Valencia)

     Craig D. Roberts (Nanjing U.)
 
     Andrea Shindler (Aachen U.)
 
     Hyeon-Dong Son (Inha U.)
 
     Qinghua Xu (Shandong U.); remote
 
     Yuji Yamazaki (Kobe U.)
 
     Zhihong Ye (Tsinghua U.); remote
 
     Yong Zhao (Argonne National Lab.); remote
 
     Jian Zhou (Shandong U.); remote
Registration
Registration for workshop on parton distribution functions in the EIC era
Participants
    • 08:30 09:00
      Registration 30m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 09:00 11:00
      Session: Session 1 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: C.-J. David Lin (Institute of Physics, National Yang Ming Chiao Tung University)
      • 09:00
        Neural Network Training for Parton Distribution Functions 40m
        Speaker: Luigi Del Debbio
      • 09:40
        Energy Correlators and TMD Structure (remote) 40m
        Speaker: Prof. Zhongbo Kang (University of California - Los Angeles)
      • 10:20
        Quantum entanglement between partons in strongly coupled quantum field theories (remote) 40m

        In this talk, we discuss the quantum entanglement between partons using non-perturbative light-front Hamiltonian methods. By constructing reduced density matrices from hadronic light-front wave functions, we compute von Neumann entropy, mutual information, and linear entropy directly for each parton species. Starting from a simple scalar theory in 3+1D in the strong-coupling regime, we show that the entanglement entropy is directly linked to the Shannon entropy of the transverse momentum dependent parton distributions (TMDs) in the quenched framework. Conversely, the unquenched theory reveals non-classical correlations where entanglement entropy transcends classical parton distribution probabilities. This work establishes entanglement as a fundamental probe of non-perturbative dynamics, providing a roadmap for applications to QCD bound states and future collider phenomenology. Finally, I will also discuss extensions to QCD bound states.

        Speaker: Yang Li (University of Science and Technology of China)
    • 11:00 11:05
      Group photo Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 11:05 11:20
      Coffee 15m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 11:20 13:00
      Session: Session 2 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Luigi Del Debbio
      • 11:20
        High-precision calculation of the Quark–Gluon coupling from Lattice QCD 40m
        Speaker: Alberto Ramos
      • 12:00
        TMD physics from lattice QCD (remote) 40m

        Understanding the origin of the proton’s mass and spin, as well as the mechanism of color confinement, lies at the heart of the scientific mission of future collider experiments such as the Electron-Ion Collider at Brookhaven National Laboratory. Over the past decade, lattice QCD has emerged as a powerful first-principles tool for studying parton physics, particularly through the Large Momentum Effective Theory (LaMET), which provides a systematic framework for calculating the PDFs, GPDs, and TMDs from the lattice. In this talk, I will review recent progress in lattice calculations of multi-dimensional parton structure and discuss their impact on, and interplay with, current and future experiments.

        Speaker: Dr Yong Zhao (Argonne National Laboratory)
      • 12:40
        Lattice extraction of the Collins-Soper kernel via auxiliary fields 20m

        The Collins-Soper (CS) kernel may be obtained through the TMD soft function by formulating the Wilson line in terms of 1-dimensional auxiliary fermion fields on the lattice. Our computation takes place in the region of the lattice that corresponds to the “spacelike” region in Minkowski space, i.e., Collins' scheme. By computing the "double ratio"; we are able to obtain a formula for directly calculating the CS kernel. The matching of our result to Minkowski space is achieved through the mapping of the complex auxiliary field directional vector to the Wilson line rapidity. We present a preliminary extraction of the CS kernel using the "double ratio", and discuss the methodology employed.

        Speaker: Wayne Morris (NYCU)
    • 13:00 14:00
      Lunch 1h Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 14:00 16:00
      Session: Session 3 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Alberto Ramos
      • 14:00
        Hadron structure with lattice QCD and connection to EIC (remote) 40m
        Speaker: Constantia Alexandrou
      • 14:40
        Calculating the low Mellin moments of the pion light-cone distribution amplitude using the HOPE method 40m
        Speaker: Robert Perry
      • 15:20
        A New Approach to Hadron Structure from Lattice QCD: Gradient Flow in the EIC Era (remote) 40m
        Speaker: Andrea Shindler
    • 16:00 16:30
      Coffee 30m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 16:30 17:50
      Session: Session 4 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Po-Ju Lin (National Central University)
    • 08:55 09:00
      Announcement 5m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 09:00 11:00
      Session: Session 5 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Jen-Chieh Peng (University of Illinois at Urbana-Champaign)
      • 09:00
        Insights into the Emergence of Hadron Mass and Structure 40m

        Visible matter is characterised by a single mass scale, i.e., the
        proton mass. The proton’s existence and structure are supposed to be
        described by QCD; yet, absent Higgs boson couplings, chromodynamics is
        scale-invariant. So, if the Standard Model is truly a part of the theory of Nature, then the proton mass is an emergent feature of QCD; and emergent hadron mass (EHM) must provide the basic link between theory and observation. This presentation will sketch recent progress in elucidating the character of EHM. Special emphasis will given to the three pillars of EHM namely, the momentum-dependent gluon mass, QCD's process-independent effective charge, and the running quark mass; their role in stabilising strong interaction theory; and their measurable expressions in a diverse array of observables.

        Speaker: Craig Roberts
      • 09:40
        Nucleon transverse momentum dependent parton distributions and the EicC (remote) 40m
        Speaker: Tianbo Liu
      • 10:20
        Recent TMD measurements at STAR and the connection to EIC (remote) 40m
        Speaker: Qinghua Xu
    • 11:00 11:20
      Coffee 20m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 11:20 13:00
      Session: Session 6 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Wen-Chen Chang (Institute of Physics, Academia Sinica)
      • 11:20
        Recent Progress of Nucleon Structure Study at Jlab (remote) 40m
        Speaker: Zhihong Ye
      • 12:00
        Near-Threshold Photoproduction as a Probe of the Nucleon Gravitational Structure (remote) 20m

        The energy–momentum tensor (EMT) provides a fundamental, gauge-invariant description of the distribution of energy, momentum, and internal forces within hadrons. Its matrix elements define the gravitational form factors (GFFs), which encode key aspects of nucleon structure, including mass decomposition, spatial distributions of pressure and shear forces, and the angular momentum carried by quarks and gluons. In this talk, I will present recent phenomenological results of gluonic GFFs and their application to the near-threshold photoproduction of $J/\psi$, with predictions relevant to the $J/\psi-007$ and GlueX experiments at Jefferson Lab and their implications at EIC within the generalized parton distribution framework.

        Speaker: Dr Bheemsehan Gurjar (University of Science and Technology of China)
      • 12:20
        Forward baryon production and meson structure in ep collisions 40m
        Speaker: Yuji Yamazaki
    • 13:00 14:00
      Lunch 1h Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 14:00 16:00
      Session: Session 7 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Yuji Yamazaki
      • 14:00
        Pion TMD PDFs from phenomenology 40m
        Speaker: Valentin Moos (NYCU)
      • 14:40
        PION AND KAON STRUCTURE MEASUREMENTS AT EIC AND JLAB 40m

        Pion and kaons, the lightest bound states in the hadron spectrum, are essential to understand the strong interaction in the non-perturbative domain of QCD. They are connected to the Goldstone modes of dynamical chiral symmetry breaking, the mechanism thought to generate nearly all hadron mass in the visible universe. Pion and kaons thus provide a novel perspective on the emergent hadron mass and confinement mechanisms in QCD. The distribution of the fundamental constituents, the quarks and gluons, is expected to be different in pions, kaons, and nucleons. However, experimental data are sparse. As a result, there has been persistent doubt about the behavior of the pion's valence quark structure function at large Bjorken-x and virtually nothing is known about the contribution of gluons. Experiments at 12 GeV JLab using the Sullivan process may provide insight. The Electron-Ion Collider with an acceptance optimized for forward physics could vastly extend the kinematic range of pion and kaon charts. This would allow for measurements testing if the origin of mass is encoded in the differences of gluons in pions, kaons, and nucleons, and measurements that could serve as a test of assumptions used in the extraction of structure functions and the pion and kaon form factors. Measurements at an EIC would also allow to explore the effect of gluons at high x. In this talk we will discuss new results from JLab and the prospects of such measurements at EIC.

        Speaker: Prof. Tanja Horn (CUA)
      • 15:20
        Meson and Nucleon Structure Measurements at the EIC (remote) 40m
        Speaker: Stephen Kay (University of York)
    • 16:00 16:30
      Coffee 30m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 16:30 17:30
      Session: Session 8 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Tanja Horn (CUA)
      • 16:30
        Pion and Kaon PDFs 40m
        Speaker: Wen-Chen Chang (Institute of Physics, Academia Sinica)
      • 17:10
        Parton physics from a heavy-quark operator product expansion: Dynamical lattice QCD calculation of moments of the kaon light-cone distribution amplitude 20m

        The light-cone distribution amplitude (LCDA) is a fundamental non-perturbative quantity for understanding hadron structure and exclusive scattering processes. We report on our calculation of the pion and kaon LCDAs using the heavy-quark operator product expansion (HOPE) framework. This method employs an OPE analysis of hadronic amplitudes through the inclusion of a fictitious valence heavy quark. In these talk, we report progress on the determination of the first three nontrivial Mellin moments of the kaon LCDAs from dynamical lattice QCD calculations, thereby demonstrating the feasibility of the HOPE method for accessing higher moments.

        Speaker: Sheng Pin Chang (Institute of Physics National Yang Ming Chiao Tung University)
    • 19:00 21:00
      Workshop banquet 榮榮園浙寧餐廳 https://maps.app.goo.gl/7Bqj8DHpUWwXgwZf8: Rong Rong Yuan Restaurant

      https://share.google/uXHNhc6Kjz8vbwmig

    • 09:00 10:50
      Session: Session 9 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Taku Gunji
    • 10:50 11:20
      Coffee 30m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 11:20 12:20
      Session: Session 10 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Chia Ming Kuo (National Central University, Taiwan)
      • 11:20
        Plans for the upcoming ZDC EMCAL beam test and open discussion 1h
        Speaker: Po-Ju Lin (National Central University)
    • 12:20 13:30
      Lunch 1h 10m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 13:30 15:30
      Session: Session 11 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Kentaro Kawade (Shinshu University)
      • 13:30
        Status of the ZDC Simulation (remote) 25m
        Speaker: Ralf Seidl (RIKEN)
      • 13:55
        Status of ZDC simulation studies in Korea (remote) 25m
        Speaker: Saehanseul Oh (Sejong University)
      • 14:20
        Status of ZDC simulation studies in Taiwan 20m
        Speaker: Chia-Yu Hsieh (Academia Sinica, Taiwan)
      • 14:40
        Status of the BTOF 25m
        Speaker: Satoshi Yano (Hiroshima University)
      • 15:05
        Status of the Barrel Imaging Calorimeter (BIC) for the ePIC Experiment 25m

        We present an overview of the Barrel Imaging Calorimeter (BIC) for the ePIC experiment at the EIC, including its physics motivation and detector concept. Particular emphasis will be given to recent R&D efforts, with a focus on contributions from the Korean group. Current prototype developments and future plans will also be briefly discussed.

        Speaker: Shinhyung Kim (Kyungpook National University)
    • 15:30 16:00
      Coffee 30m Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
    • 16:00 17:25
      Session: Session 12 Meeting Room, 5F, New Phys Bldg

      Meeting Room, 5F, New Phys Bldg

      Institute of Physics, Academia Sinica

      No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 115201, Taiwan (R.O.C.)
      Convener: Yuji Goto (RIKEN)