Prospects for extraction of GPDs from global fits of current and future data

Heavy Ion Laboratory (Cyklotron)

Heavy Ion Laboratory (Cyklotron)

Ludwika Pasteura 5A, 02-093 Warszawa

The meeting will bring together experimental and theoretical researchers for informal presentations and in-depth discussions. A particular goal will be to enable future collaborative work on process simulations and physics impact studies. The topics of the workshop include among the others:

  • experiences in the phenomenology of DVCS/DVMP,

  •  perspectives of the multichannel analysis,

  • the LO and NLO fitting challenges,

  • discussion of the fitting approaches/strategies,

and of course of everything that you think is crucial to make the sound predictions/extractions/fits.

  • Aleksandra Pedrak
  • Anatolii Koval
  • Andrzej Sandacz
  • Arkadiusz Trawiński
  • Barbara Badelek
  • Boguslaw Zwieglinski
  • Christian Weiss
  • Cédric Mezrag
  • Dieter Müller
  • elke-caroline aschenauer
  • Francois-Xavier Girod-Gard
  • Hervé MOUTARDE
  • Jacek Rozynek
  • Jakub Wagner
  • Kemal Tezgin
  • Kornelija Passek-Kumericki
  • Krešimir Kumerički
  • Krzysztof Cichy
  • Lech Szymanowski
  • Marie Boër
  • Maxime DEFURNE
  • Oskar Grocholski
  • Pawel Zupranski
  • Paweł Sznajder
  • Peter Kroll
  • Salvatore Fazio
  • simonetta liuti
  • Stefan Diehl
  • Teresa Tymieniecka
  • Tolga Altinoluk
  • Zygmunt Patyk
    • 09:00 09:15
      Greetings from the NCBJ director 15m
      Speaker: Krzysztof Kurek
    • 09:15 10:00
      GPD myths and prospects 45m
      Speaker: Dieter Müller (Theoretical Physics II, Ruhr-University Bochum )
    • 10:00 10:45
      GPDs@EIC 45m

      Elke Caroline Aschenauer

      Speaker: Elke-Caroline Aschenauer (BNL)
    • 10:45 11:05
      Coffee Break 20m
    • 11:05 11:50
      Parton distribution functions from Lattice QCD 45m

      In this talk, I will discuss the computation of collinear PDFs in the framework of Lattice QCD, using the so-called quasi-PDF approach introduced by Xiangdong Ji in 2013 and intensively developed thereafter. We employed twisted mass fermions with light quark mass set to its physical value. The relevant matrix elements obtained on the lattice were non-perturbatively renormalized and converted to the $\overline{MS}$ scheme at the scale of 2 GeV. A matching process was applied together with nucleon mass corrections, leading to the reconstruction of light-cone PDFs. We observe a similar behavior between the lattice and phenomenological data, and for both types of polarized PDFs a nice overlap for a range of Bjorken-x values. This presents a major success for the emerging field of direct calculations of quark distributions using Lattice QCD. I will also discuss perspectives for extracting GPDs using a similar approach.

      Speaker: Krzysztof Cichy (Adam Mickiewicz University)
    • 11:50 12:35
      The need for a computing framework for GPDs 45m
      Speaker: Hervé Moutarde (IRFU, CEA Saclay)
    • 12:35 13:45
      Lunch Break 1h 10m
    • 13:45 14:30
      Mechanical properties of proton based on multipole model 45m
      Speaker: Arkadiusz Trawiński (IRFU, CEA - Saclay)
    • 14:30 15:15
      Exploring structure and dynamics with GPDs at EIC 45m
      Speaker: Christian Weiss (JLab)
    • 15:15 15:35
      Coffee Break 20m
    • 15:35 23:35
      Discussion 8h
    • 09:00 09:45
      GPDs from meson electroproduction 45m
      Speaker: Peter Kroll (University of Wuppertal)
    • 09:45 10:30
      CLAS12 Deep Virtual φ 45m
      Speaker: Francois-Xavier Girod-Gard (JLab / UConn )
    • 10:30 10:50
      Coffee Break 20m
    • 10:50 11:35
      On meson production, higher orders, DAs and all that 45m
      Speaker: Kornelija Passek-Kumerički (Institut Ruđer Bošković)
    • 11:35 12:20
      Beam spin asymmetries from hard exclusive pion electro-production in the deeply virtual region with CLAS and CLAS 12 45m
      Speaker: Stefan Diehl (UConn )
    • 12:20 12:45
      Photoproduction of a large invariant mass photon pair 25m
      Speaker: Aleksandra Pędrak (NCBJ)
    • 12:45 13:55
      Lunch Break 1h 10m
    • 13:55 15:00
      Speaker: Paweł Sznajder (NCBJ)
    • 15:00 15:20
      Coffee Break 20m
    • 15:20 18:30
      Speaker: Paweł Sznajder (NCBJ)
    • 19:00 20:30
      Social dinner (optional, self supported) 1h 30m Restaurant - TBA

      Restaurant - TBA

    • 09:00 09:45
      Models of Distribution Amplitudes and GPDs 45m
      Speaker: Cédric Mezrag (INFN Roma 1 )
    • 09:45 10:30
      A discussion about GPD experiments and Machine Learning 45m
      Speaker: Maxime Defurne (CEA-Saclay )
    • 10:30 10:50
      Coffee Break 20m
    • 10:50 11:35
      Some fitting and extraction experiences and status of the GeParD code 45m
      Speaker: Krešimir Kumerički (University of Zagreb )
    • 11:35 12:20
      Global analysis of DVCS data 45m
      Speaker: Paweł Sznajder (NCBJ)
    • 12:20 13:30
      Lunch Break 1h 10m
    • 13:30 14:15
      CANCELLED - Extraction of Observables from Deeply Virtual Exclusive Electron Proton Scattering Experiments 45m
      Speaker: Simonetta Liuti (University of Virginia )
    • 14:15 15:00
      GPD studies with TCS 45m
      Speaker: Marie Boër
    • 15:00 15:20
      Coffee Break 20m
    • 15:20 23:20
    • 09:00 09:45
      GPD program with Jefferson Lab 12 GeV Upgrade and the Center for Nuclear Femtography 45m
      Speaker: Latifa Elouadrhiri (JLab)
    • 09:45 10:30
      Results on deeply virtual exclusive processes from COMPASS 45m
      Speaker: Andrzej Sandacz (NCBJ)
    • 10:30 10:50
      Coffee Break 20m
    • 10:50 11:35
      GPDs in high-mass photoproduction 45m
      Speaker: Lech Szymanowski (NCBJ)
    • 11:35 12:20
      Flavor dependence of the GPDs in the large N_c limit 45m
      Speaker: Kemal Tezgin (Uconn)
    • 12:20 13:30
      Lunch Break 1h 10m
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