EINN2025

27 Oct 2025, 09:00 → 1 Nov 2025, 18:45 Europe/Athens

Monday 27 October

Welcome reception in Coral Beach Hotel & Resort hotel: Welcome reception

Tuesday 28 October

Registration

Conference Talks

1 Opening

Speaker: Martha Constantinou (Temple University)

2 Studying hadrons and nuclei with electromagnetic processes: Experimental overview

Electromagnetic processes are essential and versatile tools in studying myriad aspects of hadronic and nuclear physics. This talk will offer a tour of the various ways in which electromagnetic processes and probes are used to inform our understanding of hadron structure, hadronization mechanisms, what partonic bound states exist, and properties of extreme nuclear matter. We’ll also consider how electromagnetic interactions in comparison to hadron-hadron interactions can shed light on questions of universality and unique features of QCD due specifically to its non-Abelian nature.

Speaker: Christine Aidala

3 Theoretical Perspectives on Electromagnetic Hadronic Physics

I’ll give my personal perspective on a general overview of the most recent and relevant theoretical developments about how we picture the internal structure of hadrons.

Speaker: Marco Radici (Istituto Nazionale di Fisica Nucleare)

Coffee break

Conference Talks

4 What’s next for the theory of muon g-2?

The anomalous magnetic moments of the muon and the electron, 𝑎μ and 𝑎ₑ, are precision benchmarks of the Standard Model and promising New-Physics probes. The hadronic vacuum polarization (HVP) contribution remains the dominant source of uncertainty, a problem compounded by the current tension between data-driven (dispersive) and lattice QCD evaluations. I will discuss the status of the HVP contribution, contrasting the two approaches and highlighting recent progress in understanding isospin-breaking effects. The subleading hadronic light-by-light (HLbL) contribution still leaves considerable room for improvement. Looking further ahead, the electron 𝑔−2, once the fine-structure constant αₑₘ is known with greater precision, may provide an additional stringent constraint on hadronic contributions. These developments chart the path toward reducing theoretical uncertainties to the level of the completed Fermilab measurement of the muon 𝑔−2.

Speaker: Vladimir Pascalutsa (University of Mainz)

5 From Anomaly to Agreement: The Muon g−2 Puzzle in Light of Recent Theory and Experiment

The anomalous magnetic moment of the muon, $a_\mu$, has long been a precision benchmark for testing the Standard Model, with persistent tensions between experiment and theoretical predictions driving intense activity over the past five years, particularly since 2020 with the publication of the first White Paper by the Muon $g-2$ Theory Initiative. This talk reviews the evolution of this puzzle in light of the latest White Paper, released earlier this year, which incorporates state-of-the-art first-principles determinations and effectively eliminates the discrepancy with experiment, confirming the Standard Model at the sub-ppm level. A key development has been the replacement of dispersive evaluations of the hadronic vacuum polarization with high-precision lattice QCD results, enabled by major methodological and computational advances. Nonetheless, residual tensions persist, most notably between lattice QCD and dispersive approaches, the latter still undergoing extensive reanalysis by multiple groups. I will summarize the current theoretical landscape, highlight the advances in lattice QCD that reshaped the comparison with experiment, and discuss the open issues and prospects for further scrutiny of $a_\mu$ as a probe of new physics.

Speaker: Simone Bacchio

6 Current view on the muon g-2

Speaker: Fred Jegerlehner (DESY Zeuthen)

Lunch Break

Parallel Workshop 1

7 Electromagnetic Form Factors of the Nucleon with Dispersively Improved Chiral Effective Field Theory

In this talk, I will show how effective field theory can be combined with dispersion theory to provide a representation of the nucleon's electromagnetic form factors that incorporates the correct analytical structure and the dynamics of QCD at low energy. As an application, I will present how this approach contributes to the determination of the proton's charge and magnetic radii, as well as its predictions for the MUSE experiment.

Speaker: Prof. Jose Manuel Alarcon (University of Alcalá)

8 Nucleon electromagnetic form factors at large momentum from Lattice QCD

Proton and neutron electric and magnetic form factors are the primary characteristics of their spatial structure and have been studied extensively over the past half-century. At large values of the momentum transfer $Q^2$ they should reveal transition from nonperturbative to perturbative QCD dynamics and effects of quark orbital angular momenta and diquark correlations. Currently, these form factors are being measured at JLab at momentum transfer up to $Q^2=18$ GeV$^2$ for the proton and up to 14 GeV$^2$ for the neutron. We will report an updated calculation of these form factors using nonperturbative QCD on the lattice, including $G_E$ and $G_M$ nucleon form factors with momenta up to $Q^2=12$ GeV$^2$, pion masses down to the almost-physical $m_\pi$=170 MeV, several lattice spacings down to $a=0.073$ fm, and high $O(10^5)$ statistics. Specifically, we study the $G_E/G_M$ ratios, asymptotic behavior of the $F_2/F_1$ ratios, and flavor dependence of contributions to the form factors. We observe some qualitative agreement of our ab initio theory calculations with experiment. Comparison of our calculations and upcoming JLab experimental results will be an important test of nonperturbative QCD methods in the almost-perturbative regime.

Speaker: Dr Sergey Syritsyn (Stony Brook University)

9 Nucleon electromagnetic and weak form factors

Nucleon electroweak form factors contain relevant details about hadronic structure and strong interactions in the nonperturbative regime. This information is encoded in their dependence on the momentum transferred to the nucleon by external probes but also in their quark-mass dependence, which is accessible by Lattice QCD (LQCD) simulations.

In our study we rely on relativistic chiral perturbation theory (ChPT) in two flavors with explicit Delta(1232) degrees of freedom. For the electromagnetic isovector form factors we also employ dispersion theory to account for rho-dominated isovector pion-pion interaction and its quark-mass dependence in the t-channel nonperturbatively and beyond NLO in ChPT. With this framework we explore how LQCD data are described in both the Q2 and mpi dimensions simultaneously. Furthermore, we have performed an NNLO calculation of the nucleon axial form factor, extracting relevant low-energy constants from a combined set of recent LQCD results from different collaborations.

Speaker: Fernando Alvarado (GSI)

10 Dispersive analysis of two photon reactions

We perform a coupled-channel dispersive analysis of $γ^{(∗)}γ^{(∗)} \to \pi\pi/\pi\eta/K\bar{K}$ using a modified Muskhelishvili–Omnès framework that enforces analyticity and unitarity, modeling the left-hand cut with pion/kaon and vector-meson pole terms. Both unsubtracted and subtracted forms are studied, the latter incorporating Adler-zero constraints. The S-wave $\pi\pi/K\bar{K}_{I = 0}$ and $\pi\eta/K\bar{K}_{I=1}$ channels describe the $f_0(500)$, $f_0(980)$, and $a_0(980)$, while the D-wave is anchored by the $f_2(1270)$ and $a_2(1320)$ resonances. As an application to $(g − 2)_\mu$, we obtain dispersive HLbL rescattering estimates from scalar channels with improved precision over narrow-width models. A new two-photon Monte Carlo generator in development at Mainz will also be briefly presented.

Speaker: Igor Danilkin (Johannes Gutenberg University of Mainz)

Parallel Workshop 2

Coffee break

Parallel Workshop 1

11 Chiral symmetry and nuclear interactions

Chiral effective field theory has become a standard tool to analyze low-energy reactions involving pions, nucleons and external electroweak sources. I will briefly describe conceptual foundations of this method, review our recent efforts towards developing it into a precision tool for low-energy nuclear physics and discuss some of the remaining challenges.

Speaker: Evgeny Epelbaum

12 Lattice QCD calculations for Nuclear Physics

Lattice QCD has matured into a powerful nonperturbative tool for directly probing the low-energy regime of the strong interaction from the QCD Lagrangian. Specifically, lattice QCD now offers quantitative insights into two- and three-nucleon interactions, nuclear binding energies, hypernuclear forces, and electroweak matrix elements relevant to neutrino-nucleus scattering and double beta decay. Despite the challenges of signal-to-noise degradation and computational scaling for multi-baryon systems, recent algorithmic developments and analysis techniques have enabled ab initio calculations of hadronic and nuclear observables with increasing precision. Moreover, lattice QCD plays a pivotal role in constraining effective field theories and informing phenomenological models, bridging the gap between fundamental theory and experimental observables.

In this talk, I will present key results obtained by the NPLQCD collaboration. I will focus on baryon-baryon interactions and discuss how these findings compare with results from other lattice collaborations.

Speaker: Assumpta Parreño (University of Barcelona)

13 New Results on 2N and 3N Short-Range Correlations

The existence of two-nucleon short-range correlations (2N SRCs) has been well established by a series of experiments at SLAC and Jefferson Lab. The inclusive measurements showed a universal behavior in A/D cross section ratios of quasielastic scattering at x>1 and moderate Q2 yielding a constant value. In these kinematics mean field contributions fall off rapidly and 2N SRC contributions dominate. In even higher x-values (x>2), it was argued that contributions from 3N SRCs might dominate. Existing experimental searches for 3N SRCs have yet to provide unambigious and significant evidence for them. A recent 12 GeV Jefferson Lab experiment measured the quasi-elastic scattering off various nuclei in the kinematic region that is sensitive to the 3N SRCs. This talk will discuss the state of the field and present new results on 2N and 3N SRCs.

Speaker: Nadia Fomin

Parallel Workshop 2

Poster session

Wednesday 29 October

Conference Talks

14 Overview of Charmonium-like Spectroscopy

In recent years, a number of charmonium-like XYZ states have been observed above the open-charm threshold in experiments like BABAR, BESIII, Belle(II) and LHCb. Their properties often go against our expectations for regular charmonium states, rendering their interpretation difficult. In this talk, I will give an overview of recent activities aiming to shed light on the nature of the XYZ states.

Speaker: Nils Hüsken (JGU Mainz)

15 Progress in three-particle scattering from lattice QCD

I will review recent advances in studying three-particle interactions directly from lattice QCD. By employing mathematical relations that connect discrete finite-volume energies and matrix elements to physical scattering and decay amplitudes, it is now possible to calculate observables that go beyond the single-hadron or elastic two-hadron regime. In addition to outlining the formalism, I will highlight recent applications and discuss future prospects and open challenges.

Speaker: Maxwell Hansen (University of Edinburgh)

16 Recent Results from GlueX

The detailed understanding of how quantum chromodynamics (QCD) gives rise to the spectrum of hadrons is currently one of the biggest open questions in hadron physics. Most of the observed states are classified as quark-antiquark mesons or three-quark baryons. However, QCD allows for a much richer spectrum with more complex configurations. Experimental evidence exists for such non-conventional hadrons like hybrid mesons, in which an excited gluonic field is coupled to a quark-antiquark pair and contributes directly to the meson properties.
Worldwide, different experimental facilities have dedicated and complementary hadron spectroscopy programs. The GlueX experiment, which is located in Hall D at Jefferson Lab, USA, uses a linearly polarized photon beam with energies of up to 12 GeV incident on a liquid hydrogen target and consists of a high-acceptance spectrometer with excellent charged as well as neutral particle detection capabilities. This allows us to study the production mechanisms and decays of a wide range of hadronic resonances.

This talk gives an overview of the recent results from the GlueX experiment.

Speaker: Farah Afzal (Ruhr University Bochum)

Coffee break

Conference Talks

17 Effective Field Theories for Few-Nucleon Systems

The low-energy limit of QCD is represented by a tower of effective field theories (EFTs): Chiral, Pionless, Halo/Cluster, and Roto-Vibrational, with perhaps others still to be developed. EFTs have transformed the landscape of nuclear theory by providing a systematic framework to account for multi-body forces and currents following the same tenets used in other areas of physics. However, issues of consistency remain with the most popular, Chiral EFT. I will describe recent developments in the simpler, Pionless EFT to illustrate how it provides a basis for nuclear structure and reactions that is consistent with QCD.

Speaker: Ubirajara Van Kolck

18 Phenomenology of GPDs and synergy with lattice QCD

Generalized parton distributions (GPDs) offer a powerful framework to access the multidimensional structure of hadrons, allowing in particular for so-called nucleon tomography and providing access to elements of the hadron energy–momentum tensor. The extraction of GPDs from experimental data is, however, challenging and often cannot be performed in a complete way due to difficulties arising from the deconvolution of amplitudes. In parallel, lattice QCD has achieved notable progress in computing quantities relevant to GPDs from first principles. The growing synergy between lattice results and phenomenological models provides new opportunities for cross-validation, improved parametrizations, and enhanced predictive power.

In my talk, I will highlight recent developments in GPD phenomenology, discuss ongoing efforts to integrate lattice inputs, and outline prospects for a unified description of hadron structure through combined theoretical and experimental approaches.

Speaker: Paweł Sznajder (National Centre for Nuclear Research, Poland)

19 Overview of Experimental Efforts on GPDs

An overview of the experimental activities for the study of generalised parton distributions will be presented. These include existing measurements of exclusive processes in lepton-hadron and hadron-hadron interactions as well as planned activities for the future.

Speaker: Charlotte Van Hulse

Lunch Break

Parallel Workshop 1

20 The Proton Size Revealed through the Energy Momentum Tensor Form Factors

The size of the proton has traditionally been defined by its charge radius, neglecting the role of gluons despite their dominance in its structure. Here we report the first global experimental extraction of the proton’s total scalar energy density, reconstructed from near-threshold $J/\psi$ production data to provide the gluonic contribution and the quark contribution from DVCS. We show that the total scalar field defines the proton’s largest spatial extent, exceeding both mass and charge radii, and thus sets the effective size of the proton. This result fundamentally reframes our understanding of nucleon structure and highlights the central role of gluons in shaping visible matter.

Speaker: Dr Zein-Eddine Meziani (Argonne National Laboratory)

21 Constraining the GPD E: Deeply Virtual Compton Scattering off the neutron with CLAS12 at Jefferson Lab

A key step toward a better understanding of the nucleon structure is the study of Generalized Parton Distributions (GPDs). GPDs are nowadays the object of an intense effort of research since they convey an image of the nucleon structure where the longitudinal momentum and the transverse spatial position of the partons inside the nucleon are correlated. Moreover, GPDs give access, via Ji's sum rule, to the contribution of the orbital angular momentum of the quarks to the nucleon spin. Deeply Virtual Compton scattering (DVCS), the electroproduction of a real photon off the nucleon at the quark level, is the golden process directly interpretable in terms of GPDs of the nucleon. The GPDs are accessed in DVCS mainly through the measurements of spin-dependent asymmetries. Combining measurements of asymmetries from DVCS experiments on both the neutron and the proton will allow performing the flavor separation of relevant quark GPDs via linear combinations of proton and neutron GPDs. This talk will give an overview of experiments aiming to constrain the GPD E, one of the least know GPDs. Focus will be directed towards the recently published neutron-DVCS measurements from the CLAS12 experiment at Jefferson Lab with the upgraded ~11 GeV CEBAF polarized electron beam. In particular, details on the measurement of Beam Spin Asymmetries from neutron-DVCS will be presented. The impact of the measurement on the extraction of the Compton form factor (CFF) E related to the GPD E of the neutron will be discussed. Further discussion will motivate the foreseen measurements with the CLAS12 experiment on a transversly polarized proton target aiming to extract the CFF E of the proton.

Speaker: Adam Hoballah Hobart (IJCLab CNRS-IN2P3)

22 Progress for x-dependent GPDs from Lattice QCD

In this talk, we discuss the recent progress in lattice QCD determinations of generalized parton distributions. The recently developed framework of asymmetric frames of reference, now complete for the vector, axial vector and tensor cases, allows for cost effective calculations of GPDs across a broad range of kinematics. This makes the prospects of their full mapping realistic in the near future, although requiring careful quantification of all systematic effects. We show a selection of our recent results and discuss future prospects, involving also synergy with phenomenology and experiment.

Speaker: Krzysztof Cichy (Adam Mickiewicz University, Faculty of Physics)

23 Generalized Parton Distributions of the proton from Lattice QCD: Transversity case

With the upcoming Electron-Ion Collider, interest in proton tomography has greatly increased due to experiments, like DVCS are able to be conducted. A large set of functions that gives a great amount of information about the structure are Generalized Parton Distribution functions (GPDs). Recently, the $x$-dependence of GPDs has been extracted from lattice QCD. Utilizing a novel method that gives access to a wide range for the kinematic parameters (PRD 106 (2022) 11, 114512), we extract the transversity GPDs for the proton: $H_T$, $E_T$, $\tilde{H}_T$, and $\tilde{E}_T$. Calculations are done in zero-skewness with an $N_f = 2+1+1$ ensemble of twisted mass fermions with a clover improvement. The quark masses give a pion mass of roughly 260 MeV.

Speaker: Joshua Miller

Parallel Workshop 2

Coffee break

Parallel Workshop 1

24 x-dependence of hadron GPDs at physical pion mass from the lattice

Generalized Parton Distributions (GPDs) provide a unified framework for exploring the three-dimensional structure of hadrons, encoding correlations between spatial and momentum distributions as well as spin and orbital angular momenta of quarks and gluons. Lattice QCD offers a first-principles approach to access these nonperturbative quantities, but long-standing challenges have limited calculations to low moments. Recent developments in large-momentum effective theory (LaMET) and related approaches have enabled direct studies of the full Bjorken-$x$ dependence of parton distributions, opening new opportunities for lattice inputs to global analyses.
In this talk, I will review the progress of lattice QCD calculations of parton distributions, with an emphasis on generalized parton distributions. I will highlight results on pion and nucleon GPDs at the physical pion mass and discuss recent advances in renormalization and matching, as well as systematic effects and strategies for controlling them. Together, these developments mark an exciting era where lattice QCD inputs can play a decisive role in unraveling the three-dimensional structure of hadrons.

Speaker: Huey-Wen Lin (Michigan State University)

25 TMD factorization at next-to-leading power

Theoretical control of soft interactions is fundamental to establish TMD factorization. It is possible to sistematically include soft interactions through soft modes in bacckground field method to reach a consistente factorization of SIDIS or Drell-Yan cross sections at next-to-leading power, where all nonperturbative terms are expressed as martix elements of field operators. As a practical example one can consider the case of jet production in SIDIS

Speaker: Ignazio Scimemi (Universidad Complutense Madrid)

26 Unpolarized twist-two GPD and the trace anomaly

We present a one-loop perturbative study of unpolarized twist-two generalized parton distributions (GPDs) for external on-shell gluon states. A finite quark mass 𝑚 is kept throughout: it serves as an infrared regulator and, crucially, enables an explicit realization of the full trace-anomaly relation. By taking second Mellin moments, we extract the associated gravitational form factors (GFFs) in QED and QCD and verify the matching implied by the energy–momentum tensor operator identity, including the gluonic trace term. Particular attention is given to anomaly-induced “anomaly-pole” structures. The analysis complements our previous work on polarized twist-two GPDs and the axial anomaly, providing a unified picture of anomaly effects in partonic correlators.

Speaker: Ignacio Castelli

Parallel Workshop 2

Thursday 30 October

Conference Talks

27 Overview of Recent Developments of TMDs from Lattice QCD

In recent years, significant progress has been made in extracting transverse-momentum-dependent (TMD) hadron structure from lattice QCD. In this talk, I will give a brief overview of recent developments in lattice calculations of TMD physics, including the determination of the soft function, the Collins–Soper kernel, and the computation of TMD parton distribution functions and TMD wave functions.

Speaker: Jianhui Zhang (The Chinese University of Hong Kong, Shenzhen)

28 Overview of Recent Developments for TMDs

In this talk I will review the current status of transverse momentum dependent (TMD) physics and related phenomena, including both unpolarized and polarized observables. Such studies give us insight into the 3-dimensional structure of hadrons. The focus of the talk will be on recent developments in theory and phenomenology regarding the extraction of TMD parton distribution functions and fragmentation functions (TMDs). The talk will also cover connections of TMDs to aspects of high-energy physics, lattice QCD, and AI/ML.

Speaker: Daniel Pitonyak (Lebanon Valley College)

29 Progress of Polarizabilities from Lattice QCD

I will discuss a lattice QCD calculation of the nucleon electric polarizabilities at the physical pion mass. Our findings reveal the substantial contributions of the Nπ states to these polarizabilities. Without considering these contributions, the lattice results fall significantly below the experimental values, consistent with previous lattice studies. This observation has motivated us to compute both the parity-negative Nπ scattering up to a nucleon momentum of ∼ 0.5 GeV in the center-of-mass frame and corresponding Nγ∗ → Nπ matrix elements using lattice QCD. Our results confirm that incorporating dynamic Nπ contributions is crucial for a reliable determination of the polarizabilities from lattice QCD. This methodology lays the groundwork for future lattice QCD investigations into various other polarizabilities.

Speaker: Xu Feng (Columbia University)

Coffee break

Conference Talks

30 Searching for Physics Beyond the Standard Model at the EIC

The Electron Ion Collider (EIC) is designed to further our understanding of hadronic physics. However, it could also provide opportunities to look for new phenomena beyond the Standard Model. In this talk, we will provide examples of such physics, with a focus on new light particles that may be associated with a dark sector. We will illustrate how the EIC can probe new model parameter space and complement searches in other experimental venues, over the coming decades.

Speaker: HOOMAN DAVOUDIASL (Brookhaven National Laboratory)

31 The Future Program of PRad and Dark Sector Searches at JLab

The PRad-II and X17 Experiments are planned to run in Jefferson Lab’s Hall B in 2026. The common experimental setup includes a large-volume vacuum system, two planes of GEM tracking detectors for improved vertex and angle reconstruction, and a high-resolution calorimeter (HyCal). These experiments strive to give definite answers to long-standing questions in hadron physics. PRad-II is addressing the discrepancy in elastic electron-proton scattering at momentum transfers between 0.01 and 0.06 GeV$^2$ that are seen between the world’s most complete data set taken with focusing magnetic spectrometers on the one side and the data set from the first proton charge radius experiment at Jefferson Lab (PRad).
PRad-II will provide a measurement of the proton electric form factor at momentum transfers down to $Q^2\approx$ 10$^{−5}$ GeV$^2$ and improve the overall precision on the proton charge radius by about a factor of three compared to PRad. The X17 experiment is searching for a hypothetical light boson with a mass of about 17 MeV/c$^2$ that has been discussed to explain some anomalous nuclear transition data.
The HyCal could be re-used in the mid-term future as one of the calorimeter blocks for the Beam Dump eXperiment (BDX), an electron-beam thick-target experiment aimed to search for the existence of light Dark Matter particles in the MeV$-$GeV mass region at Jefferson Lab. BDX will be able to lower the exclusion limits by one to two orders of magnitude in the parameter space of dark-matter coupling versus mass.

Speaker: Patrick Achenbach (Jefferson Lab)

32 Exploring strange hadronic matter through femtoscopy at the LHC

Understanding the interactions among strange hadrons is crucial for developing a realistic equation of state of nuclear matter in dense environments as in the interior of neutron stars. In recent years, significant theoretical progress has been achieved through Effective Field Theories, which provide interaction models anchored to experimental data, and through Lattice QCD calculations that enable first-principles studies of baryon-baryon and meson-baryon interactions. On the experimental side, major efforts at facilities such as DAΦNE, J-PARC, RHIC, FAIR, and the LHC have yielded increasingly precise measurements aimed at constraining and validating theoretical predictions. In this contribution, I will highlight the main achievements in this field, with a focus on the femtoscopy technique at the LHC. This method has provided the most precise information to date on the low-energy dynamics of several particle pairs in the strangeness sector, including systems with double and triple strangeness. Recent extensions to the three-body systems further demonstrate the capability of femtoscopy to investigate few-body dynamics for strange hadrons with unprecedented precision. Finally, I will discuss the implications of these measurements for our understanding of the equation of state of neutron stars.

Speaker: Raffaele Del Grande (Czech Technical University in Prague (CZ))

Lunch Break

Parallel Workshop 1

33 Baryon resonances from lattice QCD

Lattice QCD calculations have now reached the maturity required to determine the properties of hadronic resonances from first principles. In this talk, I will review recent progress on baryon resonances, with particular emphasis on the $\Lambda(1405)$, the $\Delta(1232)$, and two-nucleon systems. I will also outline the path toward exploring higher-lying resonances in QCD, highlighting recent advances that open the way to the study of three-hadron resonances.

Speaker: Fernando Romero-Lopez (Uni Bern)

34 Dalitz-plot decomposition of $e^+ e^- \to J/\psi \, \pi \, \pi$ process from 4.1271 to 4.3583 GeV employing dispersive analysis

We analyze the processes $e^+ e^- \to \gamma^* \to J/\psi \, \pi \, \pi \, (K \bar{K})$ and $e^+ e^- \to \gamma^* \to h_c \, \pi \, \pi$ using the recently proposed Dalitz-plot decomposition approach, based on the helicity formalism for three-body decays. Within a Lagrangian-based toy model, we validate key aspects of this approach, namely the factorization of the overall rotation for all decay chains and spin alignments, as well as crossing symmetry between final states. In analyzing the experimental data, we describe the subchannel dynamics through a dispersive treatment of $\pi\pi/K\bar{K}$ interactions, reproducing the $f_0(500)$ and $f_0(980)$ pole structures. Using recent $e^+ e^- \to J/\psi \, \pi \, \pi$ data in the 4.1271-4.3583 GeV range, we reproduce invariant mass spectra that reveal both $Z_c(3900)$ and $Z_c(4020)$ states and discuss prospects for further constraints on the $Y(4220)$ and $Y(4320)$.

Speaker: Viktoriia Ermolina (Johannes Gutenberg University of Mainz)

35 Kaon semileptonic form factors at the physical quark masses on large volumes in lattice QCD

We present our results for the kaon semileptonic form factors calculated
by using the $N_f=2+1$ and $2+1+1$ PACS10 configuration, whose physical volumes
are more than $($10 fm$)^4$ at the physical quark masses in the lattice spacings
from 0.04 to 0.08 fm. The configurations were generated using the Iwasaki
gauge action and stout-smeared clover quark action. The form factors near
zero momentum transfer can be calculated thanks to the large volume.
Using our data, a stable interpolation of the form factors to zero momentum
transfer is carried out. The value of $|V_{us}|$ is determined using
the interpolated result of the form factors at zero momentum transfer.
Our value of $|V_{us}|$ is compared with a prediction of the standard model
estimated from the CKM matrix unitarity and with those determined using
the previous lattice results.

Speaker: Takeshi Yamazaki (University of Tsukuba)

36 Towards continuum limit of Meson Charge Radii using large volume configuration at physical point in Nf=2+1 lattice QCD

We present our preliminary determination of the charge radii of light mesons using the PACS10 configurations, which were generated at the physical point on large volumes of more than $(10\,\text{fm})^3$ by the PACS Collaboration. In general, charge radius calculations suffer from systematic effects due to chiral extrapolation, finite lattice spacing effect, finite volume effect, and the choice of fit ansatz. By employing the PACS10 configurations, we can control the first three systematics in a unified manner. Furthermore, we apply a model-independent extraction method to avoid the systematic uncertainty associated with the fit ansatz. Our preliminary results of the charge radii for $\pi^+$, $K^+$, and $K^0$ are consistent with experimental and previous lattice determinations, while exhibiting reduced uncertainties.

Speaker: Dr Kohei Sato (Seikei University)

Parallel Workshop 2

Coffee break

Conference Talks: Oral presentation of three best posters

Friday 31 October

Conference Talks

37 Status of ePIC Collaboration and the Science Program

The Electron-Ion Collider will explore the internal structure of nucleons and nuclei with unprecedented precision. By colliding polarized electrons with polarized protons and a range of nuclei across a broad kinematic regime, the EIC will enable multi-dimensional probes of nucleon structure, including TMDs, GPDs, and other partonic correlations. These measurements are essential for understanding the origin of nucleon spin, mass, and other emergent QCD phenomena.

In this talk, I will present the status of the ePIC Collaboration and its science program, briefly reviewing the detector design and capabilities as well as the collaboration organization. I will outline the physics priorities, highlight key goals enabled by the EIC, and note how ePIC’s program complements and extends ongoing efforts across the global hadron physics community.

Speaker: Maria Żurek (Lawrence Berkeley National Labolatory)

38 Hyperon Time-like Form Factors at BESIII

The never ending story of baryon time-like form factors continues and renew itself, fed by the powerful process of synergic and mutually reinforcing actions of experiments and theory.
Hyperons, with their self analyzing weak decays give the unique possibility to investigate the complex nature of form factors and mainly to test concepts based on first principles, which can be exploited to study dynamical mechanisms considered unknowable until recently.
BESIII analysis, with their accuracy, offer the opportunity of enhancing knowledge and understanding of the mechanisms underlying the electromagnetic interaction of hyperons.
I will review recent discoveries, highlighting new developments and improvements to existing knowledge—improvements that, in some cases, have actually rethought previously well-established concepts.

Speaker: Prof. Simone Pacetti (Istituto Nazionale di Fisica Nucleare)

39 Heavy-Ion Collisions as a Precision Laboratory for Hot and Cold QCD

I review recent developments in the field of heavy ion collisions and quark gluon plasma physics with focus on the role of nucleon and nuclear structure, electromagnetic probes, as well as connections to the future Electron Ion Collider.

Speaker: Bjoern Schenke (Brookhaven National Laboratory)

Coffee break

Conference Talks

Lunch Break

Excursion

Social dinner

Saturday 1 November

Conference Talks

40 Summary Workshop 1

Speaker: Barbara Pasquini (Istituto Nazionale di Fisica Nucleare)

41 Summary Workshop 2

Speaker: Abhay Deshpande

Coffee break

Conference Talks

42 Directions in hadron physics: theory

Plan for Nuclear Science and the NuPECC 2024 Long Range Plan for European Nuclear Physics. Both reports emphasize the central role of QCD-focused nuclear theory in supporting and guiding the hadron physics program. This talk will outline the major directions for hadron physics theory in the coming decade, highlight the big science questions that must be addressed, discuss the evolving research and funding landscape, and describe the new tools and approaches that theory should embrace.

Speaker: Ian Cloet

43 Directions in hadronic physics: experiment

The status and plans for experimental programs in hadronic physics in Asia, Europe and N. America will be summarized.

Speaker: Richard Milner (MIT)

44 Closing

Speaker: Martha Constantinou (Temple University)