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HyperMu SIGNED

Hyperfine splittings in muonic atoms and laser technology

Total Cost €

EC-Contrib. €

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.

accuracy patented models nucleus contributions thin data cavity hyperfine puzzle nucleon ranging radii exchange m1 detector qed mu devoted lattice proton pulse contribution model corresponding polarizability discrepancy splitting electron bound reanalysis 2s never plan weak energies ppm potentially publications laser magnetic refinements unpolarized mainly structure assumed nuclear technologies zemach disk physics proposals extracted ground sigma predictions scattering schemes 3he few edge cutting standard relative pulsed attracted experiments qcd form 1 2p attempted energy benchmarks calculations muonic muon radius parametric line industrial refined beam hydrogen probed 7 optical transitions 1s theories conversion hundreds extract hfs photon describing polarized spectroscopy turn

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 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.	CH (VILLIGEN PSI)	coordinator	1˙999˙926.00

Map

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

List of publications.
year	authors and title	journal	last update
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. GÃ¶tzfried, T. Graf, T.W. HÃ¤nsch, 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.; GÃ¶tzfried, J.; Graf, T.; Guerra, M.; Haack, J.; HÃ¤nsch, 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 Â 4He ions and the muonic Â 3Heâ€“Â 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 HÃ¤nsch, 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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