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HyperMu SIGNED

Hyperfine splittings in muonic atoms and laser technology

Total Cost €

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EC-Contrib. €

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Partnership

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 HyperMu project word cloud

Explore the words cloud of the HyperMu project. It provides you a very rough idea of what is the project "HyperMu" about.

spectroscopy    patented    accuracy    refinements    calculations    edge    never    lattice    bound    physics    hyperfine    exchange    discrepancy    qed    potentially    attracted    proposals    optical    extract    muonic    structure    describing    photon    attempted    proton    pulsed    unpolarized    nucleus    form    sigma    beam    models    cutting    theories    hundreds    scattering    data    line    parametric    magnetic    model    qcd    industrial    standard    radius    3he    nuclear    technologies    ground    turn    detector    muon    zemach    splitting    few    thin    extracted    predictions    nucleon    pulse    benchmarks    electron    laser    disk    weak    reanalysis    relative    publications    polarizability    experiments    hfs    schemes    ppm    ranging    devoted    energies    conversion    2s    mu    refined    polarized    1s    cavity    plan    energy    probed    m1       radii    puzzle    assumed    2p    hydrogen    contribution    corresponding    transitions    mainly       contributions   

Project "HyperMu" data sheet

The following table provides information about the project.

Coordinator
PAUL SCHERRER INSTITUT 

Organization address
address: FORSCHUNGSTRASSE 111
city: VILLIGEN PSI
postcode: 5232
website: www.psi.ch

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Switzerland [CH]
 Total cost 1˙999˙926 €
 EC max contribution 1˙999˙926 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-COG
 Funding Scheme ERC-COG
 Starting year 2017
 Duration (year-month-day) from 2017-10-01   to  2022-09-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    PAUL SCHERRER INSTITUT CH (VILLIGEN PSI) coordinator 1˙999˙926.00

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 Project objective

The proton radius extracted from the measurements of the 2S-2P energy splitting in muonic hydrogen (μp) has attracted great attention because of a 7σ discrepancy with the values extracted from electron scattering and hydrogen (H) spectroscopy. Hundreds of publications have been devoted to the so called “proton radius puzzle” ranging from studies of physics beyond the standard model, to reanalysis of electron scattering data, refinements of bound-state QED calculations, new theories describing the proton structure, and proposals for new scattering and H spectroscopy experiments. As next step, I plan two new (i.e., never before attempted) measurements: the ground-state hyperfine splitting (1S-HFS) in both μp and μ3He with 1 ppm relative accuracy by means of pulsed laser spectroscopy. From these measurements the nuclear-structure contributions (two-photon-exchange) can be extracted with a relative accuracy of 100 ppm which in turn can be used to extract the corresponding Zemach radii (with a relative accuracy of 0.1%) and polarizability contributions. The Zemach radii can provide magnetic radii when form-factor data or models are assumed. These radii are benchmarks for lattice QCD and few-nucleon theories. With the polarizability contribution they impact our models of the proton and of the 3He nucleus. Moreover, the μp measurement can be used to solve the discrepancy between the magnetic radii values as extracted from polarized and unpolarized electron scattering and to further test bound-state QED predictions of the 1S-HFS in H. These two experiments require a muon beam line, a target with an optical cavity, detector, and laser systems. As weak M1 transitions must be probed, large laser-pulse energies are needed, thus cutting-edge laser technologies (mainly thin-disk laser and parametric down-conversion) need to be developed. Laser schemes of potentially high industrial impact that I have just patented will be implemented and refined.

 Publications

year authors and title journal last update
List of publications.
2019 Karsten Schuhmann, Klaus Kirch, Andreas Knecht, Miroslaw Marszalek, Francois Nez, Jonas Nuber, Randolf Pohl, Ivo Schulthess, Laura Sinkunaite, Manuel Zeyen, Aldo Antognini
Passive alignment stability and auto-alignment of multipass amplifiers based on Fourier transforms
published pages: 2904, ISSN: 1559-128X, DOI: 10.1364/AO.58.002904
Applied Optics 58/11 2019-06-06
2018 C.M.B. Monteiro, F.D. Amaro, M.S. Sousa, M. Abdou-Ahmed, P. Amaro, F. Biraben, T. Chen, D.S. Covita, A.J. Dax, M. Diepold, L.M.P. Fernandes, B. Franke, S. Galtier, A.L. Gouvea, J. Götzfried, T. Graf, T.W. Hänsch, M. Hildebrandt, P. Indelicato, L. Julien, K. Kirch, A. Knecht, F. Kottmann, J.J. Krauth, Y. Liu, J. Machado, F. Mulhauser, B. Naar, T. Nebel, F. Nez, R. Pohl, J.P. Santos, J.M.F. dos Santos, K. Schuhmann, C.I. Szabo, D. Taqqu, J.F.C.A. Veloso, A. Antognini
On the double peak structure of avalanche photodiode response to monoenergetic x-rays at various temperatures and bias voltages
published pages: C01033-C01033, ISSN: 1748-0221, DOI: 10.1088/1748-0221/13/01/c01033
Journal of Instrumentation 13/01 2019-06-06
2017 Krauth, J. J.; Schuhmann, K.; Ahmed, M. Abdou; Amaro, F. D.; Amaro, P.; Biraben, F.; Cardoso, J. M. R.; Carvalho, M. L.; Covita, D. S.; Dax, A.; Dhawan, S.; Diepold, M.; Fernandes, L. M. P.; Franke, B.; Galtier, S.; Giesen, A.; Gouvea, A. L.; Götzfried, J.; Graf, T.; Guerra, M.; Haack, J.; Hänsch, T. W.; Hildebrandt, M.; Indelicato, P.; Julien, L.; Kirch, K.; Knecht, A.; Knowles, P.; Kottmann, F.; Bigot, E. -O. Le; Liu, Y. -W.; Lopes, J. A. M.; Ludhova, L.; Machado, J.; Monteiro, C. M. B.; Mulhauser, F.; Nebel, T.; Nez, F.; Rabinowitz, P.; Rapisarda, E.; Santos, J. M. F. dos; Santos, J. P.; Schaller, L. A.; Schwob, C.; Szabo, C. I.; Taqqu, D.; Veloso, J. F. C. A.; Voss, A.; Weichelt, B.; Willig, M.; Pohl, R.; Antognini, A.
The proton radius puzzle
published pages: , ISSN: , DOI:
3 2019-06-06
2018 Marc Diepold, Beatrice Franke, Julian J. Krauth, Aldo Antognini, Franz Kottmann, Randolf Pohl
Theory of the Lamb Shift and fine structure in muonic  4He ions and the muonic  3He– 4He Isotope Shift
published pages: 220-244, ISSN: 0003-4916, DOI: 10.1016/j.aop.2018.07.015
Annals of Physics 396 2019-06-06
2018 S Schmidt, M Willig, J Haack, R Horn, A Adamczak, M Abdou Ahmed, F D Amaro, P Amaro, F Biraben, P Carvalho, T-L Chen, L M P Fernandes, T Graf, M Guerra, T W Hänsch, M Hildebrandt, Y-C Huang, P Indelicato, L Julien, K Kirch, A Knecht, F Kottmann, J J Krauth, Y-W Liu, J Machado, M Marszalek, C M B Monteiro, F Nez, J Nuber, D N Patel, E Rapisarda, J M F dos Santos, J P Santos, P A O C Silva, L Sinkunaite, J-T Shy, K Schuhmann, I Schulthess, D Taqqu, J F C A Veloso, L-B Wang, M Zeyen, A Antognini, R Pohl
The next generation of laser spectroscopy experiments using light muonic atoms
published pages: 12010, ISSN: 1742-6588, DOI: 10.1088/1742-6596/1138/1/012010
Journal of Physics: Conference Series 1138 2019-06-06

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