ECT*-APCTP Joint Workshop: Exploring resonance structure with transition GPDs

21 Aug 2023, 09:00 → 25 Aug 2023, 18:00 Europe/Rome

Aula Renzo Leonardi (ECT*)

Chang-Hwan Lee (Pusan National University), Charlotte Van Hulse (University of Alcala, Madrid Region, Spain), Christian Weiss (Jefferson Lab), Kyungseon Joo (University of Connecticut (UConn), Storrs/US), Stefan Diehl (Justus Liebig University Giessen and University of Connecticut), Vladimir Braun (University Regensburg, Germany)

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Generalized Parton Distributions (GPDs) are a well-established tool for exploring the 3D structure of the nucleon and mechanical properties such as the distributions of energy/momentum and forces in the system. While extensive studies have been performed for the ground-state nucleon, little is known about the 3D structure of resonances. The nucleon-to-resonance (N->N*) transition GPDs provide a unique tool for exploring the 3D structure and mechanical properties of nucleon resonances. They can be measured in exclusive processes with N -> N* transitions. First data on these reactions are becoming available from experiments at JLab12, and strategies for their analysis and theoretical interpretation need to be developed. The workshop will bring together theorists and experimentalists, in particular, including scientists from APCTP and ECT* member countries, to review the status of nucleon GPDs, present the first experimental results for transition GPDs, develop a strategy for analysis and interpretation, and discuss the prospects of future experimental programs (EIC, J-PARC, PANDA). This workshop will be partially supported by Asia Pacific Center for Theoretical Physics.

 

      

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PosterECT-APCTP2023.pdf

Monday, 21 August

09:30 → 10:00 Introduction and plan of workshop

Speaker: Organizers of the workshop

ect23_transition_intro.pdf

10:00 → 10:40 Theory of DVCS and DVMP analysis

Speaker: Simonetta Liuti (University of Virginia)

liuti_ECT_TransitionGPD23.pdf

10:40 → 11:10 Break

11:10 → 11:25 Welcome by the director of ECT*

Speaker: Gert Aarts (Swansea University and ECT*)

11:25 → 12:05 Tools and practice of GPD extraction

Speaker: Pawel Sznajder (NCBJ Warsaw)

sznajder_trento_0323.pdf

12:05 → 12:45 Evolution effects in GPDs

Speaker: Valerio Bertone (IRFU)

bertone_GPD_workshop_21_08_2023.pdf

12:45 → 14:00 Lunch

14:00 → 14:40 Global GPD extraction and parametrisation

Speaker: Yuxun Guo (Maryland University)

GUMP_ECT.pptx

14:40 → 15:20 DVCS measurements with CLAS12

Speaker: Hyon-Suk Jo (Kyungpook National University)

hyonsuk.jo_ECT-APCTP.Joint.Workshop_2023.08.21.pdf

15:20 → 15:40 Break

15:40 → 16:20 Theoretical description of the N->N* DVCS process with transition GPDs

Speaker: Marc Vanderhaeghen (Mainz University)

vanderhaeghen_ECT_Aug2023.pdf

16:20 → 16:35 Perspectives for the measurement of the N->N* DVCS process with CLAS12

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

Diehl_ECT_2023_tranistionGPDs_DVCS.pdf

16:35 → 17:30 Discussion: DVCS analysis and transition GPDs

Speaker: all participants

17:30 → 19:00 Welcome Reception

Tuesday, 22 August

09:00 → 09:40 Toward Lattice QCD calculations of GPDs

Speaker: Martha Constantinou (Temple University)

ECT_ APCTP_Aug_2023_Constantinou.pdf

09:40 → 10:20 KIinematic twist-three corrections to pseudo- and quasi-GPDs and translation invariance

Speaker: Vladimir Braun (U. Regensburg)

kinematic3.pdf

10:20 → 10:50 Break

10:50 → 11:30 Discussion: Prospects of Lattice QCD calculations of GPDs

Speaker: all participants

11:30 → 12:10 Theoretical studies of transition GPDs

Speaker: Kirill Semenov-Tian-Shansky (Kyungpook National University)

Talk_Trento_August_2023_Semenov.pdf

12:10 → 14:00 Lunch

14:00 → 14:40 Soliton approach to quark distribution functions

Speaker: Hyun-Dong Son (Korea University)

HDSon_ECTs-APCTP.pdf

14:40 → 15:20 QCD angular momentum in baryon transitions

Speaker: Christian Weiss (Jefferson Lab)

weiss23_ect23_transition.pdf

15:20 → 15:50 Break

15:50 → 16:30 QCD energy-momentum tensor in N -> Delta Transitions

Speaker: Jun-Young Kim (Jefferson Laboratory)

Tran_GPDs_Trento_JUNYOUNG.pdf

16:30 → 18:00 Discussion: Properties and models of transition GPDs

Speaker: all participants

Wednesday, 23 August

09:00 → 09:40 GPD program with hadronic beams

Speaker: Shunzo Kumano (Japan Women's University / KEK)

Kumano-ECT_-GPD-J-PARC-2023-08.pdf

09:40 → 10:20 Transition GPDs at J-PARC

Speaker: Wen-Chen Chang (Institute of Physics, Academia Sinica)

2023_ECT_GPDatJPARC_wchang.pdf

10:20 → 10:50 Break

10:50 → 11:30 TCS measurements at JLAB and future perspectives

Speaker: Pierre Chatagnon (Jefferson Laboratory)

ECTstar_Workshop_Chatagnon.pdf

11:30 → 12:00 Discussion

Speaker: all participants

12:00 → 13:30 Lunch

13:30 → 14:10 N* physics with CLAS/CLAS12

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

ECT 2023 JOO v1.pdf

14:10 → 14:50 Coupled-channel Analysis

Speaker: Deborah Roenchen (FZ Juelich)

Nstars_transition_GPDs_roenchen.pdf

14:50 → 15:30 Discussion: N* physics and transition GPDs

Speaker: all participants

15:30 → 16:00 Break

16:00 → 18:00 Interaction / collaboration time

Speaker: all participants

Thursday, 24 August

09:00 → 09:40 N-Delta transition GPDs

Speaker: Peter Kroll (University of Wuppertal)

trento23.pdf

09:40 → 10:20 Exploring GPDs with deeply virtual rho0 and pi0 production at CLAS12

Speaker: Andrey Kim (University of Connecticut)

AKim_ECT_APCTP_Joint_workshop_08242023.pdf

10:20 → 10:50 Break

10:50 → 11:30 e p -> e pi+ Delta0 un-polarized cross sections in JLAB Hall C

Speaker: Ali Usman (University of Regina)

Trento_2023_Usman.pdf

11:30 → 12:10 Experimental investigation of transition GPDs with CLAS12 at JLAB and future opportunities

Speaker: Stefan Diehl (JLU Giessen and UCONN)

Diehl_ECT_2023_tranistionGPDs_Meson.pdf

12:10 → 12:40 Discussion: Transition GPDs in meson production

Speaker: all participants

12:40 → 14:00 Lunch

14:00 → 14:30 APCTP activities in nuclear and hadronic physics

Speaker: Chang-Hwan Lee (Pusan National University)

20230824_CHLee.pdf

14:30 → 15:10 GPDs and diffraction at HERA

Speaker: Charlotte Van Hulse (University of Alcala, Madrid Region, Spain)

ECT_talk_Charlotte_van_Hulse.pdf

15:10 → 15:50 GPD measurements at LHC

Speaker: Ronan McNulty (University College Dublin)

gpd_trento_mcnulty.pdf

15:50 → 16:10 Break

16:10 → 16:50 Measurement of diffractive dissociative J/psi production at ALICE

Speaker: Michael Winn (CEA/Irfu Saclay)

mwinn_ECT_GPD_2023.pdf

16:50 → 17:30 Exclusive processes and resonance production with EIC far-forward detector

Speaker: Alex Jentsch (Brookhaven National Lab)

ECT_transition_GPD_EIC_FarForward_Jentsch_2023.pdf

17:30 → 18:00 Discussion: GPDs in collider experiments

Speaker: all participants

19:00 → 21:00 Workshop Dinner

Friday, 25 August

09:00 → 10:30 Discussion: Future program / White Paper (part 1)

Speaker: Organizers / all participants

10:30 → 11:00 Break

11:00 → 12:00 Discussion: Future program / White Paper (part 2)

Speaker: Organizers / all participants

12:00 → 12:30 Closeout

Speaker: Organizers of the workshop

12:30 → 14:00 Lunch