Principal investigator: Kornelija Passek-Kumerički
PI's Host institution: Ruđer Bošković Institute
Project duration: 01.02.2020 to 31.07.2024
 

Project Summary

Nucleons, i.e., protons and neutrons that are the building blocks of the matter that surrounds us, pions, kaons and other hadrons consist of quarks and gluons, whose interactions are well described by the theory of strong interactions, i.e. quantum chromodynamics. But the comprehensive understanding of the bound state dynamic of hadrons and their structure is still elusive and challenging. Moreover, the experiments in particle accelerators used for Standard Model (SM) and beyond SM research are performed mostly using protons with ever higher accuracy demanding ever better description of hadron structure. In REVESTRUCTURE project we will investigate hadron structure by studying the, so-called, hard exclusive processes. Since these processes are performed at high energies where the strong force becomes weak the perturbative approach can be used in the description of the parton subprocesses and the factorization of the high and low energy dynamics enables us to access the hadron description of hadrons in terms of distribution amplitudes and generalized parton distributions. The latter objects are phenomenologically especially rewarding offering potentially a three-dimensional (3D) picture of hadrons in contrast to 1D obtained from well-known parton distribution amplitudes encountered in deeply inelastic scattering. Proposed phenomenological investigation is timely due to a recent vibrant experimental activity: a lot of data is already available or expected in the near future from JLab and COMPASS (CERN) groups, and new facilities are planned (EIC in USA, LHeC at CERN). We plan to develop the required software tools, to improve the theoretical description of the measured processes, and to analyze new processes to be measured in the future. We will confront the theoretical results with the available experimental data and through fits we will extract new informations about hadron structure. All this should make a significant step towards better understanding of hadrons.

Members

Kornelija Passek-Kumerički (PI)

RBI, Croatia

Nikola Crnković

RBI, Croatia

Goran Duplančić

RBI, Croatia

Raj Kishore

RBI, Croatia

Krešimir Kumerički

PMF, Croatia

Muhammad Saad Nabeebaccus

IJCLab, France

Lech Szymanowski

National Centre for Nuclear Research, Poland

List of publications

First Measurement of Deeply Virtual Compton Scattering on the Neutron with Detection of the Active Neutron

CLAS Collaboration, A. Hobart, S. Niccolai, M. Čuić, K. Kumerički, P. Achenbach et al.
Submitted for publication.
arXiv:2406.15539

Exclusive photoproduction of a photon-meson pair: A new class of observables to probe GPDs

G. Duplančić, S. Nabeebaccus, K. Passek-K., B. Pire, J. Schönleber, L. Szymanowski, S. Wallon
Published in PoS SPIN2023 (2024) 007 (contribution to SPIN 2023).
arXiv:2401.17656

The twist-3 contribution to deeply virtual electroproduction of pions

G. Duplančić, P. Kroll, K. Passek-K., L. Szymanowski
Published in Phys. Rev. D 109 (2024) 3, 034008
arXiv:2312.13164

NLO corrections to the deeply virtual meson production revisited: impact on the extraction of generalized parton distributions

M. Čuić, G. Duplančić, K. Kumerički, K. Passek-K.
Published in JHEP 12 (2023) 192
arXiv:2310.13837

Deeply-virtual and photoproduction of mesons at higher-order and higher-twist

K. Passek-K.
Published in Acta Phys.Polon.Supp. 16 (2023) 7, 7-A5
arXiv:2308.09422

Precision Studies of QCD in the Low Energy Domain of the EIC

V.D. Burkert et al. (K. Kumerički)
Published in Prog.Part.Nucl.Phys. 131 (2023) 104032
arXiv:2211.15746

Probing chiral-even and chiral-odd leading twist quark generalized parton distributions through the exclusive photoproduction of a γρ pair

G. Duplančić, S. Nabeebaccus, K. Passek-K., B. Pire, L. Szymanowski, S. Wallon
Published in Phys.Rev.D 107 (2023) 9, 094023
arXiv:2302.12026

Accessing chiral-even quark generalised parton distributions in the exclusive photoproduction of a γπ^± pair with large invariant mass in both fixed-target and collider experiments

G. Duplančić, S. Nabeebaccus, K. Passek-K., B. Pire, L. Szymanowski, S. Wallon
Published in JHEP 03 (2023), 241
arXiv:2212.00655

Transition GPDs and exclusive electroproduction of π-Δ(1232) final states

P. Kroll, K. Passek-K.
Published in Phys. Rev. D 107 (2023) 5, 054009
arXiv:2211.09474

Accessing GPDs Through the Exclusive Photoproduction of a Photon–Meson Pair with a Large Invariant Mass

S. Nabeebaccus, S. Wallon, G. Duplančić, K. Passek-K., B. Pire, L. Szymanowski
Published in Acta Phys.Polon.Supp. 16 (2023) 5, 16
arXiv:2212.01034

Accessing GPDs through the exclusive photoproduction of a \gammaγ-meson pair

G. Duplančić, S. Nabeebaccus, K. Passek-K., B. Pire, L. Szymanowski, S. Wallon
Contribution to DIS2022
arXiv:2209.05380

On wide-angle photo- and electroproduction of pions to twist-3 accuracy

K. Passek-K.
Published in Rev.Mex.Fis.Suppl. 3 (2022) 3, 0308113
arXiv:2203.12334

Wide-angle photoproduction of the η′-meson and its gluon content

P. Kroll, K. Passek-K.
Published in Phys.Rev.D 105 (2022) 3, 034005
arXiv:2111.08965

Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method

M. Abdulhamid et al. (N. Crnković)
Published in Eur.Phys.J.C 82 (2022) 1, 36
arXiv:2112.10465

Wide-angle photo- and electroproduction of pions to twist-3 accuracy

P. Kroll, K. Passek-K.
Published in Phys.Rev.D 104 (2021) 5, 054040
arXiv:2107.04544

Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report

R. Abdul et al. (K. Kumerički)
Published in Nucl.Phys.A 1026 (2022) 122447
arXiv:2103.05419

Electron-ion collider in China

D. P. Anderle et al. (K. Kumerički)
Published in Front.Phys.(Beijing) 16 (2021) 6, 64701
arXiv:2102.09222

Revealing proton structure with neural networks

K. Kumerički
Published in PoS(ICHEP2020) (1824-8039) 390 (2021); 1-6

Separation of Quark Flavors Using Deeply Virtual Compton Scattering Data

M. Čuić, K. Kumerički and A. Schäfer
Published in Phys.Rev.Lett. 125 (2020) 23, 232005
arXiv:2007.00029

07.06.2024:
"Twist-3 contribution to deeply virtual electroduction of pions",
K. Passek-K., talk at Transversity 2024: 7th International Workshop on "Transverse phenomena in hard processes and the transverse structure of the proton", Trieste, Italy, 03-07.06.2024

19.01.2024:
"Meson production at NLO and higher-twist revisited",
K. Passek-K., talk at RBRC Workshop: Generalized Parton Distributions for Nucleon Tomography in the EIC Era, Brookhaven National Laboratory, USA, 17-19.01.2024

29.09.2023:
"Higher order and higher-twist aspects of exclusive meson production",
K. Passek-K., talk at ACHT2023 workshop, Leibnitz (Wagna), Austria, 27-29.09.2023

28.09.2023:
"Azimuthal asymmetry in J/psi production in electron-proton collision at EIC",
R. Kishore, talk at ACHT2023 workshop, Leibnitz (Wagna), Austria, 27-29.09.2023

27.09.2023:
"Revealing the nucleon structure through exclusive meson production",
N. Crnković, talk at ACHT2023 workshop, Leibnitz (Wagna), Austria, 27-29.09.2023

10.07.2023:
"Extraction of Compton Form Factors with Gepard and PyTorch",
K. Kumerički, talk at REVESTRUCTURE workshop, Zagreb, Croatia, 10-12.07.2023

25.05.2023:
"Higher-twist contributions to deeply-virtual and photoproduction of mesons",
Kornelija Passek-K., invited talk at QCD Evolution Workshop 2023, Orsay, France, 22.-26.05.2023

28.03.2023:
"Deeply-virtual and photoproduction of pseudoscalar mesons at higher-order and higher-twist",
Kornelija Passek-K., invited talk at DIS2023: XXX International Workshop on Deep-Inelastic Scattering and Related Subjects, East Lansing, Michigan, USA, 27.-31.03.2023

17.02.2023:
"Accessing GPDs through meson production",
Kornelija Passek-K., invited talk at Meeting of the Forschungsgruppe FOR 2926, Next Generation Perturbative QCD for Hadron Structure: Preparing for the Electron-Ion Collider, Regensburg, Germany, 16.-17.02.2023

16.02.2023:
"Status and prospects of GPD determinations",
K. Kumerički, invited talk a Meeting of the Forschungsgruppe FOR 2926, Next Generation Perturbative QCD for Hadron Structure: Preparing for the Electron-Ion Collider, Regensburg, Germany, 16.-17.02.2023

17.01.2023:
"Deeply-virtual and photoproduction of mesons at higher-order and higher-twist",
K. Passek-K., invited talk at XXIX Cracow Epiphany Conference on Physics at the Electron-Ion Collider and Future Facilities, Krakow, Poland, 16.-19.01.2023

28.10.2022:
"Higher order and higher-twist aspects of DV and photoproduction of mesons",
K. Passek-K., invited talk at 3DPartons week, Paris, France, 26.-28.10.2022

27.10.2022:
"Gepard - tool for studying GPDs",
K. Kumerički, invited talk at 3DPartons week, Paris, France, 26.-28.10.2022

30.09.2022:
"Revealing Hadron Structures Through Hard Exclusive Processes",
Kornelija Passek-K., invited talk at Symposium “Relativistic Hadrons", Graz, Austria, 30.09.2022

07.09.2022:
"Theory overview of GPDs",
K. Kumerički, invited (online) talk at QNP2022 - The 9th International Conference on Quarks and Nuclear Physics, Florida State University, USA (online), 05.-09.09.2022

29.08.2022:
"Theory and phenomenology of Generalized Parton Distributions",
K. Kumerički, invited talk at IWHSS-2022 - International Workshop on Hadron Structure and Spectroscopy, CERN, 29.-31.08.2022

21.07.2022:
"Photo- and electroproduction of pions and eta mesons at twist-3",
K. Passek-K., invited (online) talk at Towards improved hadron femtography with hard exclusive reactions, Virginia Tech, USA, 18.-22.07.2022

18.07.2022:
"Multichannel GPD fits",
K. Kumerički, invited talk at Towards improved hadron femtography with hard exclusive reactions, Virginia Tech, USA, 18.-22.07.2022

25.05.2022:
"Some recent advances in GPD extraction from exclusive processes",
K. Kumerički, invited talk at Transversity 2022 - 6th international workshop on transverse phenomena in hard processes, Pavia, Italy, 23.-27.05.2022

28.03.2022:
"Gepard - tool for studying GPDs",
K. Kumerički, invited (online) talk at "GPDs at EIC" working group meeting, (online), 28.03.2021

05.11.202:
"Recent Results in Nucleon GPDs and Their Impact, or, Partons Spatial Distribution in Nucleons",
K. Kumerički, invited (online) talk at EINN2021 - 14th European Research Conference on Electromagnetic Interactions with Nucleons and Nuclei, Paphos, Cyprus (online), 31.10.- 06.11.2021

28.07.2021:
"On wide-angle photo- and electroproduction of pions to twist-3 accuracy",
K. Passek-K., conference (online) talk at HADRON 2021, 19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman, Mexico City, Mexico (online), 26.-31.07.2021

31.05.2021:
"Status of the Gepard code",
K. Kumerički, invited (online) talk at Joint GDR-QCD/QCD@short distances and STRONG2020/PARTONS/FTE@LHC/NLOAccess workshop, (online), 31.05.-04.06.2021

22.01.2021:
"Separation of Quark Flavors using DVCS Data and Other Results",
K. Kumerički, invited (online) talk at DFG Forschungsgruppe 2926 (Zoom) seminar, 22.01.2021

09.12.2020:
"Our GPD/CFF model",
K. Kumerički, invited (online) talk at Mini-workshop GPD Models and their Implementation in Data Analysis, CNF, JLab, USA (online), 9.12.2020.

24.09.2020:
"Global Fitting of Compton Form Factors",
K. Kumerički, invited (online) talk at Workshop DATA SCIENCE ROADMAP TO COMPTON FORM FACTORS OF QUARKS AND GLUONS, CNF, JLab, USA (online), 24-25.9.2020

28.07.2020:
"Revealing proton structure with neural networks",
K. Kumerički, conference (online) talk at ICHEP 2020, Prague, Czech Republic (online), 28.07.-06.08.2020

Event Organization

10-12.07.2023:
REVESTRUCTURE workshop
Zagreb; (N. Crnković, G. Duplančić, K. Kumerički, K. Passek-K., L. Szymanowski

21.-23.04.2021:
ACHT21: Perspectives in Particle, Cosmo- and Astroparticle Theory
Zagreb (online); (N. Crnković, K. Kumerički, K. Passek-K.)

 

School, Workshop and Conference Attendance

03.-14.06.2024:
The 2024 CFNS Summer School on the Physics of the Electron-Ion Collider
CFNS, Stony Brook University, USA; (N. Crnković)

05.-16.06.2023:
QCD Master Class 2023
Saint-Jacut-de-la-Mer, France; (N. Crnković)

12.-14.06.2023:
CNF Generalized Parton Distributions and Global Analysis
online, JLab Center for Nuclear Femtography; (K. Passek-K.)

26.-28.10.2022:
3DPartons week
Paris, France, 26.-28.10.2022 (N. Crnković)

24.-25.10.2022:
Gluodynamics
Paris, France, 24.-25.10.2022 (N. Crnković)

29.-31.08.2022:
IWHSS-2022 - International Workshop on Hadron Structure and Spectroscopy
CERN; (K. Passek-K.)

18.-22.07.2022:
Towards improved hadron femtography with hard exclusive reactions
Virginia Tech, USA (hybrid); (G. Duplančić)

07.-17.06.2022:
Precision calculations for future e+e– colliders: targets and tools
CERN (hybrid); (G. Duplančić)

02.02.-04.03.2022:
Frontiers in Nuclear and Hadronic Physics 2022
Firenca (online); (N. Crnković)

15.-19.11.2021:
Resummation, Evolution, Factorization 2021
workshop (online); (K. Passek-K.)

8.-12.11.2021:
Terascale Monte Carlo School: PB TMDs with CASCADE
Hamburg (online); (N. Crnković)

20.-24.09.2021:
61 Cracow School of Theoretical Physics: Electron-Ion Collider Physics
Cracow (online); (N. Crnković)

12-30.07.2021:
MITP School 2021: The Amplitude Games
Mainz (online); (N. Crnković)

14.-16.07.2021:
PARTICLEFACE 2021: Unraveling New Physics Workshop & Management Committee Meeting
Zagreb (online); (N. Crnković, G. Duplančić, K. Passek-K.)

31.05.-04.06.2021:
Joint GDR-QCD/QCD@short distances and STRONG2020/PARTONS/FTE@LHC/NLOAccess workshop
(online); (K. Kumerički, K. Passek-K.)

21.-23.04.2021:
ACHT21: Perspectives in Particle, Cosmo- and Astroparticle Theory
Zagreb (online); (N. Crnković, K. Kumerički, K. Passek-K.)

 

Outreach

Masterclasses@IRB,
19.-20.02.2024; (G. Duplančić)

Masterclasses@IRB,
21.-22.03.2023; (G. Duplančić)

Masterclasses@IRB,
15.03.2022; (G. Duplančić)

Masterclasses@IRB,
02.03.2020; (G. Duplančić)

Contact

Kornelija Passek-Kumerički

Email: passek@irb.hr
Phone: +385 1 456 1032
Ruđer Bošković Institute
Bijenička cesta 54
10000 Zagreb, Croatia