Precision Measurements and Fundamental Physics: The Proton Radius Puzzle and Beyond

Europe/Berlin
02.430 (Mainz Institute for Theoretical Physics, Johannes Gutenberg University)

02.430

Mainz Institute for Theoretical Physics, Johannes Gutenberg University

Staudingerweg 9 / 2nd floor, 55128 Mainz
Description

The 2010 measurement of the Lamb shift (2S-2P energy difference) in the muonic hydrogen atom has created the “proton radius puzzle”: The proton charge radius Rp determined from the muonic hydrogen Lamb shift differs by 4% or 6 standard deviations from the 2014 CODATA value of Rp which has been obtained from elastic electron-proton scattering and spectroscopy of electronic hydrogen and deuterium.

The puzzle is both difficult and fascinating because it impacts and requires expertise from diverse areas of particle, nuclear and atomic physics. Several new experiments have been motivated by the puzzle and are starting to produce results. Correspondingly, there is a great deal of theory effort aimed at all aspects of the puzzle.

The workshop will summarize new experimental results in atomic spectroscopy and lepton scattering; discuss new theoretical tools and ideas impacting structure effects in scattering and bound state problems; and explore new physics discovery potential with precision tests in muonic and electronic systems.

Participants (PDF)
    • 09:00 09:20
      Registration 20m 02.531

      02.531

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2<sup>nd</sup> floor, 55128 Mainz
    • 09:20 09:40
      Introduction 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speakers: Prof. Gil Paz (Wayne State University), Prof. Randolf Pohl (Johannes Gutenberg University Mainz)
    • 09:40 10:20
      Hydrogen spectroscopy in Paris 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Francois Nez
      Slides
    • 10:20 10:40
      High resolution spectroscopy of the 1S-3S transition frequency of hydrogen 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Sandrine Galtier
      Slides
    • 10:40 11:00
      Future measurements in Paris 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Simon Thomas
      Slides
    • 11:00 11:30
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 11:30 12:10
      Precision spectroscopy of the 2S-nP transition in atomic hydrogen 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Lothar Maisenbacher
      Slides
    • 12:10 12:50
      Direct Frequency Comb Spectroscopy of 1S-3S Transition in Atomic Hydrogen 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Arthur Matveev
      Slides
    • 12:50 14:10
      Lunch Break 1h 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 14:10 14:50
      Lamb shift in regular hydrogen 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Eric Hessels
    • 14:50 15:30
      Towards 1S-2S Ramsey-comb excitation of trapped He+ 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Kjeld Eikema
      Slides
    • 15:30 16:00
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 16:00 18:00
      Discussion session: electronic atoms experiment 2h 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 19:00 21:00
      Dinner 2h Mainz

      Mainz

    • 09:00 09:40
      Electron scattering off proton using the 60-MeV electron linac of Tohoku University 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Toshimi Suda
      Slides
    • 09:40 10:20
      Two-photon exchange corrections to the Lamb shift in muonic 4He 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Prof. Carl-Edwin Carlson (College of William and Mary)
      Slides
    • 10:20 11:00
      Two-photon exchange in muonic atoms 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Ms Franziska Hagelstein (Institut für Kernphysik, JGU Mainz)
      Slides
    • 11:00 11:30
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 11:30 12:10
      Point-Particle Effective Field Theory: Higher Dimensional Operators and Nuclear Polarizability 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Cliff Burgess
      Slides
    • 12:10 12:50
      Three photon exchange contribution to the Lamb shift 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Krzysztof Pachucki
      Slides
    • 12:50 14:10
      Lunch Break 1h 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 14:10 14:50
      Atomic physics from effective field theories 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Antonio Pineda
      Slides
    • 14:50 15:30
      Proton polarizability effects at orders $\alpha^5$ and $\alpha^6 \log\alpha$ 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Vladimir Pascalutsa
      Slides
    • 15:30 16:00
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 16:00 18:00
      Discussion session: atomic theory 2h 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Slides
    • 19:00 21:00
      Dinner 2h Mainz

      Mainz

    • 09:00 09:40
      Muonic atom spectroscopy 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Aldo Antognini
      Slides
    • 09:40 10:20
      Two-photon exchange in lepton- proton scattering and spectroscopy 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Mr Oleksandr Tomalak (Johannes Gutenberg-Universität Mainz)
      Slides
    • 10:20 11:00
      The deuteron-radius puzzle is alive: A new analysis of nuclear structure uncertainties 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Javier Hernandez
      Slides
    • 11:00 11:30
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 11:30 12:10
      Preliminary results from the PRad experiment 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Ashot Gasparian
      Slides
    • 12:10 12:50
      The ProRad experiment 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Dominique Marchand
      Slides
    • 12:50 14:10
      Lunch Break 1h 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 14:10 14:50
      Measurement of proton form factors with jet gas target 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Yimin Wang
      Slides
    • 14:50 15:10
      Elastic three photon exchange contribution to hyperfine structure 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Marcin Kalinowski
      Slides
    • 15:10 15:40
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 15:40 16:00
      MAMI Tour 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 16:00 18:00
      Discussion session: electronic scattering experiment 2h 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 19:00 21:00
      Dinner 2h Mainz

      Mainz

    • 09:00 09:40
      Proton rms-radius from electron scattering 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Ingo Sick
      Slides
    • 09:40 10:20
      Robust Extractions of the Proton Radius From Electron Scattering Data 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Douglas Higinbotham
      Slides
    • 10:20 11:00
      Evaluation of using low-Q2 scattering data to extract the proton radius 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Timothy Hayward
      Slides
    • 11:00 11:30
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 11:30 12:10
      Accessing GEp at low Q2 through the measurement of radiative tail 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Dr Miha Mihovilovic (JGU Mainz)
      Slides
    • 12:10 12:50
      OLYMPUS, TPE, and the new Mainz program 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Dr Jan Christopher Bernauer (MIT)
      Slides
    • 12:50 14:10
      Lunch Break 1h 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 14:10 14:50
      Comparing electron and muon scattering on the proton beyond Born approximation 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Andrei Afanasev
      Slides
    • 14:50 15:30
      High-precision Measurement of the Proton Radius with TPC 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Vahe Sokhoyan
      Slides
    • 15:30 16:00
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 16:00 18:00
      Discussion session: scattering theory 2h 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Slides
    • 19:00 21:00
      Dinner 2h Mainz

      Mainz

    • 09:00 09:40
      TREK/E36 @ J-PARC: Investigat- ing lepton universality with stopped kaon decays 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Prof. Michael Kohl (Hampton University)
      Slides
    • 09:40 10:20
      MUSE: Muon-proton scattering at PSI 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Evangeline Downie
      Slides
    • 10:20 11:00
      Preliminary analysis of the COMPASS test measurement of low-Q2 muon proton scattering 40m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Speaker: Jan Friedrich
      Slides
    • 11:00 11:30
      Coffee Break 30m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
    • 11:30 12:50
      Final Discussion 1h 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
      Slides
    • 12:50 14:10
      Lunch Break 1h 20m 02.430

      02.430

      Mainz Institute for Theoretical Physics, Johannes Gutenberg University

      Staudingerweg 9 / 2nd floor, 55128 Mainz
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