668. WE-Heraeus-Seminar on Baryon Form Factors: Where do we stand?

Europe/Berlin
Physikzentrum Bad Honnef, Germany

Physikzentrum Bad Honnef, Germany

Germany
Description

General Information

Scientific background


Electromagnetic form factors are basic quantities containing the dynamical information of the hadron structure. Although form factors constitute one of the main fields of research on hadron physics since many years, recent technical developments and discoveries modified essentially our understanding of the nucleon and opened new questions. The surprising results obtained by the JLab-GEp Collaboration, using the Akhiezer-Rekalo polarization method, have shown a decreasing of the ratio of electric to magnetic form factor of the proton, contrary to what currently assumed. Electron-positron colliders, using the initial state radiation have given precise results in the time-like region, showing the presence of regular structures. Questions on the reaction mechanism and on the size and dependence of radiative corrections on the kinematical variables are open. New, sophisticated tools start to be available, as dedicated Monte Carlo and a web site for data basis. Active developments of methods and phenomenology aim to a global understanding in time-like and space-like regions. Gathering experimentalists and theoreticians seems timely for a critical discussion of the recent results and reanalysis of data obtained at DESY, VEPPII, JLab, BABAR and BESIII, before the future measurements such as the upgraded JLab experiments, and at the future facility FAIR. The aim of the this seminar is to:

  • Clarify past and recent experimental results and critically compare different analysis and interpretations.

  • Discuss the present data from two photon exchange experiments and the applied corrections.

  • Deepen the understanding of the reaction amplitudes for the crossed elementary processes involving electrons and protons, through a unified analysis in space and time-like regions.

 

The 668. WE-Heraeus Seminar is generously supported by the Wilhelm and Else Heraeus Foundation.

The 668. WE-Heraeus-Seminar will take place at the Physikzentrum Bad Honnef-Germany from 23 to 27 April 2018.

The organizers invite young researchers to apply and to contribute to the presentation or poster sessions by using the application form.

Application deadline: 29 March 2018

 

Program
Slides
    • 08:00 09:00
      Breakfast 1h
    • 09:00 09:20
      Opening and welcome 20m
      Speaker: Scientific Organizers
      Slides
    • 09:20 10:10
      Elastic electromagnetic form factors in the space-like region: Recent results and future experiments 50m
      Speaker: Eduard J. Brash
      Slides
    • 10:10 10:40
      Coffee Break 30m
    • 10:40 11:30
      An Experimental Overview of time-like Electromagnetic Baryon Form Factors 50m
      Speaker: Monica Bertani
      Slides
    • 11:30 12:20
      On the physical meaning of time-like electromagnetic form factors 50m
      Speaker: Egle Tomasi- Gustafsson
      Slides
    • 12:20 14:30
      Conference Photo & Lunch 2h 10m
    • 14:30 15:20
      Higher order QED radiative corrections to elastic electron-proton scattering 50m
      Speaker: Andrej Arbuzov
      Slides
    • 15:20 16:10
      The contribution of light mesons to the hyperfine structure of muonic hydrogen 50m
      Speaker: Alexander Dorokhov
      Slides
    • 16:10 16:40
      Coffee Break 30m
    • 16:40 17:20
      The BabaYaga event generator 40m
      Speaker: Carlo M. Carloni Calame
      Slides
    • 17:20 17:40
      The Wilhelm and Else Heraeus Foundation 20m
      Speaker: Stefan Jorda
    • 17:40 18:15
      Poster Flash Presentations
    • 18:30 21:00
      Dinner 2h 30m
    • 08:00 09:00
      Breakfast 1h
    • 09:00 09:50
      The NNbar and multihadron production at the nucleon threshold at VEPP2000 50m
      Speaker: Evegni P. Solodov
      Slides
    • 09:50 10:40
      Fine structure of the nucleon electromagnetic form factors in the vicinity of the threshold of e+e- annihilation into nucleon-antinucleon pair 50m
      Speaker: Alexander Milstein
      Slides
    • 10:40 11:10
      Coffee Break 30m
    • 11:10 12:00
      Proton Time-Like Electromagnetic Form Factor Measurements at BESIII 50m
      Speaker: Christoph Rosner
      Slides
    • 12:00 12:30
      Cross section measurement of Lambda Lambdabar production at BESIII 30m
      Speaker: Xiaourong Zhou
      Slides
    • 12:30 14:30
      Lunch 2h
    • 14:30 15:20
      Investigation of the transition form factors of excited hyperons with HADES 50m
      Speaker: James Ritman
      Slides
    • 15:20 16:10
      Electromagnetic Form Factors of hyperons - present and future 50m
      Speaker: Karin Schoenning
      Slides
    • 16:10 16:40
      Coffee Break 30m
    • 16:40 18:30
      Poster session
    • 18:30 21:00
      Dinner 2h 30m
    • 08:00 09:00
      Breakfast 1h
    • 09:00 09:50
      Form Factors in three quark Models and in quark diquark models 50m
      Speaker: Elena Santopinto
      Slides
    • 09:50 10:40
      Anomalies in time-like baryon form factors 50m
      Speaker: Rinaldo Baldini Ferroli
      Slides
    • 10:40 11:10
      Coffee Break 30m
    • 11:10 12:00
      Partons Distributions Amplitudes and Form Factors at large momentum transfer 50m
      Speaker: Cedric Mezrag
      Slides
    • 12:00 12:30
      Discussions
    • 12:30 14:30
      Lunch 2h
    • 14:30 18:30
      Excursion 4h
    • 18:30 21:30
      HERAEUS Dinner 3h
    • 08:00 09:00
      Breakfast 1h
    • 09:00 09:50
      The low-Q2 experimental effort for the measurement of the proton radius 50m
      Speaker: Eric Voutier
      Slides
    • 09:50 10:40
      Constraints on low Q2 data for the extraction of the proton charge radius 50m
      Speaker: Mostafa Hoballah
      Slides
    • 10:40 11:10
      Coffee Break 30m
    • 11:10 12:00
      Results and implications of OLYMPUS 50m
      Speaker: Michael Kohl
      Slides
    • 12:00 12:30
      Discussions
    • 12:30 14:30
      Lunch 2h
    • 14:30 15:20
      Measurement of Analyzing Powers of the np Charge Exchange Reaction in the GeV Region 50m
      Speaker: Nikolay Piskunov
      Slides
    • 15:20 16:10
      Charge-Exchange Neutron Scattering: Extending Recoil-Polarimetry measurements of GEn/GMn to high values of Q2 50m
      Speaker: John Annand
      Slides
    • 16:10 16:40
      Coffee Break 30m
    • 16:40 17:30
      Antiproton annihilation studies with the PANDA experiment at FAIR 50m
      Speaker: Frank Maas
      Slides
    • 18:00 21:00
      Dinner 3h
    • 08:00 09:00
      Breakfast 1h
    • 09:00 09:50
      FAIR- Where do we stand? 50m
      Speaker: Inti Lehmann
      Slides
    • 09:50 10:40
      Feasibility studies for the measurement of time-like electromagnetic form factors of the proton at PANDA-FAIR 50m
      Speaker: Iris Zimmermann
      Slides
    • 10:40 11:10
      Coffee Break 30m
    • 11:10 11:40
      Perspectives in Hadron Physics, an example of international collaboration 30m
      Speaker: Marco Maggiora
      Slides
    • 11:40 12:00
      Summary and closing remarks 20m
      Speaker: Scientific organizers
      Slides
    • 12:30 14:30
      Lunch and Departure 2h