3DPartons week

26 Oct 2022, 09:15 → 28 Oct 2022, 22:15 Europe/Paris

3DPartons is a virtual access infrastructure supported by the European project STRONG-2020. 3DPartons gives access to open-source computing codes necessary for high precision phenomenology in the field of 3D hadron structure. Benefiting from the experience of decades of parton distribution function (PDF) studies, the GPD and TMD communities can find in 3DPartons a forum where they can mutualize knowledge and know-how about scientific and technical problems related to the complexity of the GPD and TMD computing chains.

Wednesday 26 October

09:15 → 12:30 GPDs at EIC

Convener: Pietro Dall'Olio (Universidad de Huelva)

09:15 Welcome

Speaker: Cédric Mezrag

Welcome.pdf

09:30 Exclusive processes with the ePIC detector at the Electron-Ion Collider

Speaker: Daria Sokhan (CEA Saclay / Glasgow U.)

3DPARTONS.pdf

10:00 Overview and prospects of DVCS studies for EIC

Speaker: Salvatore Fazio (Universita della Calabria e INFN (IT))

Fazio_Saclay_2022.pdf

10:30 Coffee Break

11:00 Low and moderate x gluon contributions to DVCS, TCS and DDVCS

Speaker: Renaud BOUSSARIE (CPHT, CNRS, Ecole polytechnique, IP Paris)

Boussarie3Dpartons.pdf

11:30 EpIC: A Monte Carlo event generator for exclusive processes

There has been an increasing interest in exclusive processes in recent years. Part of this interest stems from the open questions of how the spin of the proton is decomposed into its intrinsic spin and orbital motions, along with the possibility of gaining energy-momentum densities through exclusive processes. During this presentation, we will introduce the EpIC Monte Carlo event generator. By utilizing the PARTONS framework, the EpIC generator offers a flexible structure and a variety of model options which make it an attractive tool for the community. In addition, the EpIC generator incorporates first-order radiative corrections in its architecture. Therefore, EpIC offers a comprehensive set of features that will enable nucleon structure to be studied more deeply through impact studies on future electron-ion colliders.

Speaker: Kemal Tezgin

KT_Orsay.pdf

12:00 Exploring the Nucleus in 3D with GPDs

Speaker: Raphaël Dupré (IJCLab, Univ. Paris-Saclay)

Nuclear_GPDs.pdf

12:30 → 14:00 Lunch Break

14:00 → 15:00 GPDs on the lattice

Convener: Hervé MOUTARDE

14:00 GPDs in symmetric and asymmetric frames

Speaker: Fernanda Steffens

GPDs_Sym_Asym.pdf

GPDs_Sym_Asym.pptx

14:30 Cancelled

Speaker: Savvas ZAFEIROPOULOS

15:00 → 17:00 GPDs at LHC

Convener: Hervé MOUTARDE

15:00 GPDs in UPC with Lepton pair production

Speaker: Jakub Wagner

3DPartons.pdf

15:30 Coffee Break

16:00 Aspects of the modelling of GPDs at very small Bjorken-x

Heavy meson photoproduction in UPC provides a welcome indirect access to gluon PDFs in the very small x region. Technically, the cross-section involves generalised parton distributions (GPDs). A popular proposal to relate the GPDs to PDFs based on the Shuvaev transform has been used to interpret recent experimental data. I propose to discuss in detail the regime of validity of this proposal and to provide tools to quantify the level of uncertainty one can expect from such modelling.

Speaker: Dr Hervé Dutrieux (CEA Saclay/Irfu)

Presentation_2022_10_26__3D_partons_.pdf

16:30 Matching GTMDs onto GPDs

Speaker: Dr Valerio Bertone (C.E.A. Paris-Saclay)

bertone_3DPartons_26_10_2022.pdf

17:00 → 17:30 DVMP and multiparticle exclusive processes

Convener: Hervé MOUTARDE

17:00 Diphoton photoproduction on a nucleon at next to leading order

Speaker: Lech Szymanowski (National Centre for Nuclear Research)

LechSzym3DPartonsOrsay2022.pdf

Thursday 27 October

09:30 → 12:30 High precision DVCS

Convener: Kemal Tezgin

09:30 The DVCS experimental program @ Jefferson Lab

Speaker: Dr maxime defurne (CEA-Saclay)

electroprod_DEFURNE.pdf

10:00 Higher-power kinematic corrections in DVCS

Speaker: Vladimir Braun (University of Regensburg)

Orsay-Braun-Oct-2022.pdf

10:30 Coffee Break

11:00 Deeply-virtual Compton scattering at the next-to-next-to-leading order

Speaker: Jakob Schönleber (University of Regensburg)

DVCS_NNLO_3Dpartons.pdf

11:30 Gepard - tool for studying GPDs

Speaker: Kresimir Kumericki

kumericki_Orsay_2022.pdf

12:00 Status of PARTONS

Speaker: Hervé MOUTARDE

moutarde-3Dpartons-2022-10-26.pdf

12:30 → 14:00 Lunch Break

14:00 → 17:00 CFF and GPDs extraction

Convener: Victor Martinez

14:00 Kinematical higher-twist corrections in $\gamma^* \gamma \to M \bar{M}$

Speaker: Qintao Song (École Polytechnique)

3DPartons-talk.pdf

14:30 GUMP GPDs global analysis

Speaker: Yuxun Guo

GUMP GPD global analysis 3D parton.pptx

15:00 GPD studies with hard exclusive processes

Speaker: Marija Čuić

Cuic_Paris22.pdf

15:30 Coffee Break

16:00 Unbiased extraction of GPDs

Speaker: Paweł Sznajder (National Centre for Nuclear Research)

sznajder_271022.pdf

16:30 Deep learning models for exclusive reactions

Speaker: Brandon Kriesten

Deep Learning Models for Exclusive Reactions.pdf

17:00 → 17:30 Continuum Models

17:00 Pion from Minkowski space dynamics

Speaker: Tobias Frederico

FREDERICO_3DPARTONS_2022.pdf

17:30 → 18:30 Informal discussions with beer & wine

19:00 → 21:00 Workshop Dinner

Le gramophone, Orsay

Friday 28 October

09:30 → 12:30 DVMP and multiparticle exclusive processes

Convener: Hervé Dutrieux (CEA Saclay/Irfu)

09:30 Hard Exclusive Meson Production at COMPASS

Speaker: Mr Kamil Augsten (Czech Technical University (CZ))

KAugsten_3DPartons.pdf

10:00 Higher order and higher-twist aspects of DV and photoproduction of mesons

Speaker: Kornelija Passek-Kumerički (Ruđer Bošković Institute, Zagreb, Croatia)

Pariz2022_Passek_Kumericki.pdf

10:30 Coffee Break

11:00 Opportunities for DDVCS measurements at Jefferson Lab

Speaker: Eric Voutier

3DParton-DDVCS_Eric.pdf

11:30 Phenomenology of DDVCS in the era of new experiments

Speaker: Victor Martinez

VIctor_Friday.pdf

12:00 Accessing GPDs through the exclusive photoproduction of a photon-meson pair with a large invariant mass

Speaker: Saad Nabeebaccus (IJCLab)

3D-partons.pdf

12:30 → 14:00 Lunch Break

14:00 → 17:30 Modelling, coding and extraction efforts

Convener: Dr maxime defurne (CEA-Saclay)

14:00 Nucleon GPDs & Valence Light Front Wave Functions

Speaker: Michael Riberdy (CEA)

Nucleon_GPDs_and_Valence_Light_Front_Wave_Functions.pdf

14:30 Inverting the Radon Transform using artificial neural networks

Speaker: Pietro Dall'Olio (Universidad de Huelva)

pietro_radon.pdf

15:00 Updates from JAM collaboration

Speaker: nobuo sato (jlab)

3D partons .pdf

15:30 Coffee Break

16:00 Revisiting GPD evolution in momentum space

Speaker: Dr Valerio Bertone (C.E.A. Paris-Saclay)

bertone_3DPartons_28_10_2022.pdf

16:30 Discussion Session : Synergy between public codes and integration of state-the-art theoretical developments

Discussion.pdf