Mechanical properties of hadrons: Structure, dynamics, visualization

31 Mar 2025, 09:00 → 4 Apr 2025, 19:00 Europe/Rome

Aula Renzo Leonardi (ECT*)

Barbara Pasquini (University of Pavia and INFN-Pavia (Italy)), Christian Weiss (Jefferson Lab), Cédric Lorcé (Ecole polytechnique), Kyungseon Joo (University of Connecticut (UConn), Storrs/US), Peter Schweitzer, Stefan Diehl (Justus Liebig University Giessen and University of Connecticut)

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The "mechanical properties" of hadrons have emerged as a new field of study in strong interaction physics. They refer to the hadronic matrix elements of the QCD energy-momentum tensor and related operators, which measure physical quantities carried by the quark and gluon fields inside hadrons, such as the momentum, angular momentum, and forces. These structures are studied theoretically using lattice QCD and effective theories, and measured experimentally through the connection with the partonic structure measured in high-energy scattering processes (generalized parton distributions). They can be interpreted in terms of classical concepts like a spatial distribution of matter, motion or forces, and open new possibilities for visualization and communication with other fields of science. The workshop will review the status of the field and assess the prospects for further developments in theory and experiment (JLab 12 GeV, EIC, hadron beam facilities). 

           

POSTER_Mechanical_properties.pdf

Monday 31 March

09:00 → 12:30 Introduction

09:00 Registration

09:15 Welcome by the ECT* director

Speaker: Ubirajara van Kolck (IJCLab Orsay & University of Arizona)

09:35 Introduction: Mechanical properties of hadrons

Speaker: Christian Weiss (Jefferson Lab)

ect25_mechanical_intro.pdf

10:20 Break

10:50 Gravitational form factors theory and phenomenology

Speaker: Feng Yuan (Lawrence Berkeley National Laboratory)

ECT_GFF.pptx

11:30 Discussion

12:30 → 14:00 Lunch

14:00 → 17:30 Processes I

14:00 Gravitational form factors from deeply virtual ϕ-meson production near threshold

Speaker: Yoshitaka Hatta (BNL)

Hatta.pdf

14:40 Dispersion relations beyond the lowest order approximation: D-term and hadronic properties

Speaker: Victor Martinez-Fernandez (Institute for Research on the Fundamental Laws of the Universe (IRFU/CEA))

VMartinezFernandez_ECTstar_slides__2025_.pdf

15:20 Break

15:50 Exclusive processes: From JLab to the EIC

Speaker: Stefan Diehl (Justus Liebig University Giessen and University of Connecticut)

EIC_exclusive_Trento_2025.pdf

16:30 Discussion

17:30 → 18:45 Welcome Reception

Tuesday 1 April

09:00 → 12:30 Dynamics I

09:00 Gravitational form factors and densities in pion

Speaker: Enrique Ruiz Arriola (Universidad de Granada (Spain))

ERuizArriola_ECTstar_Trento_2025.pdf

09:40 Meson exchange dynamics in gravitational form factors

Speaker: Wojciech Broniowski (Institute of Nuclear Physics)

wb_trento.pdf

10:20 Break

10:50 1/N_c expansion for baryon structure

Speaker: Jose Goity (Hampton University and Jefferson Lab)

GOITY-talk_annotated.pdf

11:30 Discussion

12:30 → 14:00 Lunch

14:00 → 18:00 Dynamics II

14:00 Instantons and gravitational form factors

Speaker: Ismail Zahed (Stony Brook University, New York/US)

14:40 Holographic QCD and gravitational form factors

Speaker: Kiminad Abebe Mamo (College of William & Mary, USA)

TRENTO2025-slides-Mamo.pdf

15:20 Break

15:50 Chiral dynamics and gravitational form factors

Speaker: Jambul Gegelia (RUB)

QCD_Str._Of_Nucleon.pdf

16:30 Discussion

Wednesday 2 April

09:00 → 12:30 Dynamics III

09:00 Lattice QCD for mechanical properties

Speaker: Krzysztof Cichy (Adam Mickiewicz University)

cichy-trento2025.pdf

09:40 x-dependent GPDs at physical pion mass

Speaker: Prof. Huey-Wen Lin (Michigan State University)

Lin_MSULat-GPD

10:20 Break

10:50 Gravitational form factors from dispersion relations

Speaker: Feng-Kun Guo (Institute of Theoretical Physics, CAS)

GFFs_ECTstar_FKGuo.pdf

11:30 Discussion

12:30 → 14:00 Lunch

14:00 → 18:00 Interpretation

14:00 Pressure in quantum-mechanical systems

Speaker: Adam Freese (Thomas Jefferson National Accelerator Facility)

Freese_ECT_April2.pdf

14:40 Energy-momentum tensor and D-term of hydrogen atom

Speaker: Andrzej Czarnecki (University of Alberta)

15:20 Break

15:50 Interpretation of energy-momentum tensor form factors

Speaker: Xiangdong Ji (University of Maryland (UMD), College Park/US)

16:30 Discussion

19:30 → 22:00 Social Dinner

Thursday 3 April

09:00 → 12:30 Interpretation/Processes

09:00 Classical model of gravitational form factors

Speaker: Andrea Mejia

09:40 DVCS analysis using machine learning methods

Speaker: Marija Čuić (Department of Physics, Faculty of Science, University of Zagreb)

10:20 Break

10:50 Gravitational form factors using novel computational techniques

Speaker: Melany Higuera Angulo (Jefferson Lab)

11:30 Discussion

12:30 → 14:00 Lunch

14:00 → 18:00 Processes II

14:00 Transition GPDs and perspectives for mechanical properties of hadrons

Speaker: Kirill Semenov-Tyan-Shanskiy (KNU)

14:40 JLab 12 GeV exclusive processes

Speaker: Kyungseon Joo (University of Connecticut (UConn), Storrs/US)

15:20 Break

15:50 Probing Orbital Angular Momentum and Spin-Orbit Correlations at the EIC

Speaker: Shohini Bhattacharya (University of Connecticut)

16:30 Discussion

Friday 4 April

09:00 → 11:30 Round table: Future plans

09:00 Round table discussion

Speakers: Barbara Pasquini (University of Pavia and INFN-Pavia (Italy)), Christian Weiss (Jefferson Lab), Cédric Lorcé (Ecole polytechnique), Kyungseon Joo (University of Connecticut (UConn), Storrs/US), Peter Schweitzer, Stefan Diehl (Justus Liebig University Giessen and University of Connecticut)

10:20 Break

10:50 Collaboration time

11:30 → 12:00 Summary and wrap up

11:30 Workshop Summary

Speakers: Barbara Pasquini (University of Pavia and INFN-Pavia (Italy)), Christian Weiss (Jefferson Lab), Cédric Lorcé (Ecole polytechnique), Kyungseon Joo (University of Connecticut (UConn), Storrs/US), Peter Schweitzer, Stefan Diehl (Justus Liebig University Giessen and University of Connecticut)

12:00 → 13:30 Lunch