First workshop on "Perceiving the Emergence of Hadron Mass through AMBER@CERN" (EHM2020/1)

Craig Roberts (Argonne National Laboratory) , Oleg Denisov (INFN, sezione di Torino) , Jan Friedrich (Technische Universitaet Muenchen (DE)) , Wolf-Dieter Nowak (Institut fuer Hochenergiephysik Zeuthen) , Catarina Quintans (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part)

Attention: The Workshop will take place by videoconference only.

Due to the health emergency related to the Coronavirus outbreak (COVID-19), the in-person event is cancelled, and replaced by a videoconference-only workshop, on the same date:



The origin of the bulk of visible mass in the Universe is still unknown. Contrasting to the massiveness of the proton, the pion appears as unnaturally light, although both are of composite nature. This dichotomy forms a key part of the conundrum of “Emergence of Hadron Mass”.  The mechanism responsible for the generation of mass is the dynamical breaking of the scale invariance in Quantum Chromodynamics; and measurements of parton distribution functions (PDFs) are sensitive to this effect and its corollaries.

PDFs can be experimentally accessed via deep inelastic scattering, by pion and kaon-induced Drell-Yan interactions, charmonium production at moderate energies and hadro-production of direct photons. Remarkable theoretical progress has been achieved during the last decade. The resulting predictions require confrontation with accurate experimental data, like those that would become available at the AMBER experiment, very recently proposed at CERN. The prospects opened by the AMBER proposal provide now the opportunity for reviewing the present theoretical understanding of the Emergence of Hadron Mass, in order to harden and extend the list of experimental observables accessible at AMBER.

This Theory Initiative will join theorists from high-energy nuclear and particle physics, in a dialogue with the experimentalists, addressing the origin of hadron masses. The workshop is meant to start a collaborative effort between the experimentalists proposing this new measurement campaign, the phenomenologists doing global data analyses for parton distributions, and hadron-structure theorists.

  • Adam Szczepaniak
  • Anna Martin
  • Aurore Courtoy
  • Bakur Parsamyan
  • Boris Grube
  • Catarina Quintans
  • Chao Shi
  • Craig Roberts
  • Cédric Lorcé
  • Cédric Mezrag
  • Daniele Binosi
  • David Richards
  • Elmar Biernat
  • Fei Gao
  • Gastao Krein
  • Huey-Wen Lin
  • Jorge Segovia
  • José Rodriguez Quintero
  • Khépani Raya Montaño
  • Lei Chang
  • Marcia Quaresma
  • Minghui Ding
  • Oleg Denisov
  • Paul E Reimer
  • Ralf Gothe
  • Raul Briceno
  • Shusheng Xu
  • Stefano Levorato
  • Stephane Platchkov
  • Valery Lyubovitsky
  • Victor Mokeev
  • Vincent Andrieux
  • Vincent Mathieu
  • Vladimir Saleev
  • Wolf-Dieter Nowak
  • Xingbo Zhao
  • Ya Lu
  • Zhu-Fang Cui
    • Afternoon session: Setting the scene
    • Afternoon session: Meson Structure: Drell-Yan session
      • 5
        Pion parton distribution functions in a symmetry-preserving approach
        Speaker: Minghui Ding (ECT*)
      • 6
        Pion and Kaon Valence-Quark Parton Distributions from Lattice QCD
        Speaker: Huey-Wen Lin
      • 7
        Two issues concerning the pion structure function
        Speaker: Lei Chang (Nankai University)
      • 8
        Structure of Mesons and its impact on Baryons one
        Speaker: Cédric Mezrag (CEA Saclay)
      • 9
        Pion structure in Nambu--Jona-Lasinio: phenomenology
        Speaker: Aurore Courtoy (Instituto de Física, UNAM)
      • 10
        Pion and Kaon parton distributions from their light-front wave functions
        Speaker: José Rodriguez Quintero (University of Huelva)
    • Afternoon session: Meson Structure: Drell-Yan session
      • 11
        Parton distribution functions and beyond
        Speaker: Khépani Raya Montaño
      • 12
        3D imaging of pion and kaon on the light front
        Speaker: Chao Shi
      • 13
        Calculation of pion/kaon-nucleus induced Drell-Yan process from a basis light-front approach
        Speaker: Xingbo Zhao (Institute of Modern Physics, Chinese Academy of Sciences)
      • 14
        Parton distribution of nucleon
        Speaker: Fei Gao (Heidelberg university)
      • 15
        The structure of pion from first-principles calculation in lattice QCD
        Speaker: David Richards (Jefferson Lab)
      • 4:05 PM
        coffee break
    • Afternoon session: Meson structure: Charmonium production
      • 16
        Charmonium measurements with AMBER – a tool for accessing the meson PDFs
        Speaker: Stephane Platchkov (Université Paris-Saclay (FR))
      • 17
        Constraining pion PDFs with Jpsi production
        Speaker: Wen-Chen Chang (Academia Sinica (TW))
    • Afternoon session: More on meson structure
      • 18
        Quark mass function from a OGE-type interaction in Minkowski space
        Speaker: Elmar Biernat (Instituto Superior Tecnico, Universidade de Lisboa)
      • 19
        Power corrections to the Drell-Yan and Charmonium qT−spectra at moderate transverse momenta from Reggeized Partons
        Speaker: Vladimir Saleev (Samara National Research University)
      • 20
        Prompt photon production and diffractive scattering at AMBER
        Speaker: Dr Alexey Guskov (Joint Institute for Nuclear Research (RU))
    • Afternoon session: Meson Spectroscopy
      • 21
        Hadron Spectroscopy at AMBER
        Speaker: Boris Grube (Technische Universitat Munchen)
      • 22
        Spectroscopy via Lattice QCD
        Speaker: Raul Briceno (Thomas Jefferson National Accelerator Facillity)
      • 23
        An Experimental Observable to Trace the Mass from pQCD to Strong QCD
        Speaker: Ralf Gothe
      • 24
        Insight into EHM from Nucleon Resonance Electroexcitation and the Meson Structure Studies
        Speaker: Victor Mokeev (Thomas Jefferson National Accelerator Facility)
      • 25
        Continuum functional methods to study strong-QCD in new generation facilities
        Speaker: Jorge Segovia (Pablo de Olavide U., Seville)
      • 4:05 PM
        coffee break
      • 26
        Meson Spectroscopy
        Speaker: Vincent Mathieu (Complutense University of Madrid)
      • 27
        Hybrid mesons in the framework of DSEs
        Speaker: Shusheng Xu
      • 28
        Meson spectroscopy from a basis light-front approach
        Speaker: Xingbo Zhao (Institute of Modern Physics, Chinese Academy of Sciences)
    • Afternoon session: Concluding Session
      • 29
        Introduction to round table discussion
        Speaker: Catarina Quintans (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part)
      • 30
        Round table discussion
        Speaker: all
      • 31
        Future plans
        Speaker: Oleg Denisov (INFN, sezione di Torino)