Space-like and time-like electromagnetic baryonic transitions

Europe/Paris
Trento

Trento

Andrey Sarantsev (University of Bonn and Gatchina), Beatrice Ramstein (Institut de Physique Nucleaire d'Orsay), Philip Cole (Idaho State University, USA)
Description

ECT* workshop

Space like and Time like electromagnetic Baryonic transitions

8-12 May 2017 Trento

 

 

The study of electromagnetic transitions opens a window into the very nature of the strong interaction. And, indeed, such a study of how a ground-state nucleon transitions to an excited state, over a broad range of q2, will provide keen insight into the evolution of how dynamically-generated masses emerge from the asymptotically-free, nearly massless quarks of perturbative QCD as well as provide information on the ancillary effects from the meson-baryon cloud. The space-like (q2<0) region has been explored more intensively, particularly at JLab, but efforts have also begun in studying the time-like (q2>0) region at GSI. We are living in exciting times whereby near-future prospects exist in extracting high-quality data in both the space-like and time-like regimes (JLab12 and FAIR, for example). Holding the proposed meeting will bring together several disparate experimental and theoretical communities and thereby help in making the very first steps towards a much needed consistent description spanning these two kinematical regimes in q2.

The discussions will further include photoproduction measurements (ELSA, JLab, LEPS, and MAMI), wherein the q2=0 point anchors the connection between space-like and time-like regions and meson-beam data (GSI, FAIR, and J-PARC) and amply complements the requisite information for baryon spectroscopy. Finally, studies of in-medium vector meson spectral function modifications, which are related to the electromagnetic transitions in the time-like region will also be addressed.

photos
    • introduction
      Président de session: Beatrice Ramstein (Institut de Physique Nucleaire d'Orsay)
      • 09:00
        registration
      • 1
        Welcome and Overview
        Orateur: Prof. Jochen Wambach (ECT* and TU Darmstadt)
        Transparents
      • 2
        introduction
        Orateur: Beatrice Ramstein (Institut de Physique Nucleaire d'Orsay)
        Transparents
    • experimental studies of proton and neutron transitions in the space-like region
      • 3
        Nucleon Resonance Electroexcitations off Free and Quasi-Free Nucleons
        Orateur: Ralf Gothe (university of South Carolina)
        Transparents
    • Studies of time-like electromagnetic transitions
      • 4
        Studying Time like electromagnetic transitions at low q2 in proton and pion induced reactions with the HADES experiment
        Orateur: Piotr Salabura
        Transparents
    • 11:00
      coffee break
    • Baryon spectroscopy from photoproduction and meson beam experiments
      • 5
        Investigation of Baryon Excitations with the BGO-OD Experiment at ELSA.
        Orateur: Hartmut schmieden
        Transparents
    • Theoretical work for baryon spectroscopy
      • 6
        Test of quark models in photo- and electroproduction
        Orateur: Eberhart Klempt (University of Bonn)
        Transparents
    • 12:30
      Lunch
    • Theoretical work for baryon spectroscopy
      • 7
        Imaging Chiral Symmetry Breaking through Dyson Schwinger Equations.
        Orateur: Daniele Binosi (ECT* Trento)
        Transparents
    • Unified description of space-like and time-like transitions:
      • 8
        The role of the pion electromagnetic form factor in electromagnetic de-excitations of the Delta(1232) and the N*(1520)
        Orateur: Pena Teresa (IST Lisbon)
        Transparents
    • Baryon spectroscopy from photoproduction and meson beam experiments
      • 9
        Baryon spectroscopy at A2-MAMI
        Orateur: Susanna Costanza (University of Pavia)
        Transparents
    • 15:35
      coffee break
    • Theoretical approaches for baryon transition form factors in the space-like region
      • 10
        SU(2)CS and SU(2NF) hidden symmetries
        Orateur: Leonid Glozman (University of Graz)
        Transparents
      • 11
        Nucleon axial form factor at large momentum transfers
        Orateur: Vladimir Braun (University of Regensburg)
        Transparents
    • 17:05
      discussion
    • Vector mesons in medium and the connection with electromagnetic structure of time-like electromagnetic baryon transitions
      • 12
        in-medium modifications of vector meson spectral function.
        Orateur: Jochen Wambach (TU Darmstadt and ECT* Trento)
        Transparents
    • Baryon spectroscopy from photoproduction and meson beam experiments
      • 13
        Recent results from the CBELSA/TAPS experiment
        Orateur: Annika Thiel (University of Bonn)
        Transparents
    • Theoretical work for baryon spectroscopy
      • 14
        Bonn-Gatchina partial wave analysis of the vector mesons production data
        Orateur: Victor Nikonov (University of Bonn)
        Transparents
    • 10:30
      coffee break
    • Unified description of space-like and time-like transitions:
      • 15
        Hyperon transition form factors at low energies
        Orateur: Stefan Leupold (Uppsala University)
        Slides
    • Studies of time-like electromagnetic transitions
      • 16
        Nucleon and hyperon form factors with BES III and PANDA
        Orateur: Karin Schönning (Uppsala University)
        Slides
    • 12:00
      Lunch
    • Unified description of space-like and time-like transitions:
      • 17
        Model independent approaches of Time Like electromagnetic transitions
        Orateur: Andrey Sarantsev (Gatchina and University of Bonn)
        Transparents
      • 18
        Polarization and dilepton anisotropy in pion–nucleon collisions
        Orateur: Myklos Zetenyi (WRCP, Budapest and EMMI, Darmstadt)
        Transparents
    • Studies of time-like electromagnetic transitions
      • 19
        experimental study of the pi-p->ne+e- reaction
        Orateur: Federico scozzi (IPN Orsay and TU Darmstadt)
        Transparents
    • 15:30
      coffee break
    • 16:00
      discussion connection TL-SL
    • Theoretical approaches for baryon transition form factors in the space-like region
      • 20
        Not all gauge invariances are equal: Why local gauge invariance is necessary for dynamic descriptions of photo- and electroproduction processes
        Orateur: Helmut Haberzettl (The George Washington University)
        Transparents
      • 21
        Baryon spectrum and (transition) form factors from QCD’s Faddeev equation
        Orateur: Christian Fischer (University of Giessen)
        Transparents
    • Vector mesons in medium and the connection with electromagnetic structure of time-like electromagnetic baryon transitions
      • 22
        Vector Mesons and Chiral Restoration in Hadronic Matter
        Orateur: Ralf Rapp (Texas A&M University)
        Transparents
    • 10:30
      coffee break
    • Baryon spectroscopy from photoproduction and meson beam experiments
      • 23
        Hadron physics at LEPS/LEPS2 and BELLE
        Orateur: Masayuki Niiyama (Kyoto University)
        Transparents
      • 24
        Baryon Partial Wave Analysis with MAID
        Orateur: Lothar Tiator (Institut für Kernphysik, Universität Mainz)
        Transparents
    • 12:00
      Lunch
    • Theoretical work for baryon spectroscopy
      • 25
        The ANL/Osaka coupled-channel approach for baryon spectroscopy
        Orateur: Hiroyuki Kamano (KEK)
        Transparents
      • 26
        SAID Analysis of Meson Photoproduction
        Orateur: Igor Strakovsky (The George Washington University)
        Transparents
      • 27
        Baryon-to-meson transition distribution amplitudes: formalism and experimental perspectives
        Orateur: Kirill Semenov-Tyan-Shanskiy (PNPI, Gatchina)
        Transparents
    • 15:30
      coffee break
    • 16:00
      discussion baryon spectroscopy
    • Vector mesons in medium and the connection with electromagnetic structure of time-like electromagnetic baryon transitions
      • 28
        Dilepton radiation from compressed baryonic matter
        Orateur: Joachim Stroth (Goethe University Frankfurt)
        Transparents
      • 29
        In Medium Vector-Meson Spectral Functions with the Functional Renormalization Group
        Orateur: Ralf-Arno Tripolt (ECT* Trento)
        Transparents
      • 30
        polarization in a thermal medium
        Orateur: Bengt Friman (TU Darmstadt)
        Transparents
    • 10:30
      coffee break
    • 31
      discussion: medium effects
      Transparents
    • 12:30
      Lunch
    • experimental studies of proton and neutron transitions in the space-like region
      • 32
        Search for Hybrid Baryons at CLAS12
        Orateur: Annalisa D'Angelo (University of Rome)
        Transparents
      • 33
        Single pion electroproduction off proton in the resonance region with CLAS at Jefferson Lab
        Orateur: Kyungseon Joo
        Transparents
    • prospects for future studies:
      • 34
        Analysis of Pion-induced Reactions for Baryon Spectroscopy
        Orateur: Michael Döring (George Washington University)
        Transparents
    • 16:00
      coffee break
    • prospects for future studies:
      • 35
        Time-like hyperon formfactor measurements at HADES and PANDA
        Orateur: James Ritman (F-Z Jüich)
        Transparents
    • prospects for future studies:
      • 36
        Study of baryon excited states in high statistics (pi,2pi) reactions at J-PARC
        Orateur: Hiroyuki Sako
        Transparents
      • 37
        Exploring QCD phase diagram with dileptons
        Orateur: Tetyana Galatyuk (TU Darmstadt)
        Transparents
    • 10:00
      coffee break
    • prospects for future studies:
      • 38
        The future and motivations for a meson beam facility
        Orateur: William Briscoe (The George Washington University)
        Slides
      • 39
        Future directions of space-like and time-like baryonic form factors
        Orateur: Philip Cole (Idaho State University)
        Slides
    • 11:30
      discussion-conclusion
    • 40
      Lunch