Illuminating the proton radius conundrum: the μHe+ Lamb shift
Aldo Antognini
(1)
,
François Biraben
(2)
,
Joao M.R. Cardoso
(3)
,
Daniel S. Covita
(4)
,
Andreas Dax
(5)
,
Luis M.P. Fernandes
(3)
,
A. L. Gouvea
(3)
,
Thomas Graf
(6)
,
Theodor W. Hänsch
(7)
,
M. Hildebrandt
(8)
,
Paul Indelicato
(2)
,
Lucile Julien
(2)
,
Klaus Kirch
(1)
,
Franz Kottmann
(1)
,
Yi-Wei Liu
(9)
,
Cristina M.B. Monteiro
(3)
,
Françoise Mulhauser
(10)
,
Tobias Nebel
(7)
,
François Nez
(2)
,
Joaquim M.F. dos Santos
(3)
,
Karsten Schuhmann
(11)
,
David Taqqu
(1)
,
Joao F.C.A. Veloso
(4)
,
A. Voss
(6)
,
Randolf Pohl
(7)
1
ETH Zürich -
Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich]
2 LKB (Jussieu) - Laboratoire Kastler Brossel
3 DFC - Departamento de Física [Coimbra]
4 Departamento de Fisica [Aveiro]
5 Physics Department
6 IFSW - Institut für Strahwerkzeuge
7 MPQ - Max-Planck-Institut für Quantenoptik
8 PSI - Paul Scherrer Institute
9 Physics Department
10 departement de physique
11 Technol Gesell Strahlwerkzeuge
2 LKB (Jussieu) - Laboratoire Kastler Brossel
3 DFC - Departamento de Física [Coimbra]
4 Departamento de Fisica [Aveiro]
5 Physics Department
6 IFSW - Institut für Strahwerkzeuge
7 MPQ - Max-Planck-Institut für Quantenoptik
8 PSI - Paul Scherrer Institute
9 Physics Department
10 departement de physique
11 Technol Gesell Strahlwerkzeuge
Paul Indelicato
- Fonction : Auteur
- PersonId : 17063
- IdHAL : paul-indelicato
- ORCID : 0000-0003-4668-8958
- IdRef : 083262369
François Nez
- Fonction : Auteur
- PersonId : 739031
- IdHAL : francois-nez
- ORCID : 0000-0002-3478-7521
- IdRef : 161272991
Résumé
We plan to measure several 2S-2P transition frequencies in mu He-4(+) and mu He-3(+) by means of laser spectroscopy with an accuracy of 50 ppm. This will lead to a determination of the corresponding nuclear rms charge radii with a relative accuracy of 3 x 10(-4), limited by the uncertainty of the nuclear polarization contribution. First, these measurements will help to solve the proton radius puzzle. Second, these very precise nuclear radii are benchmarks for ab initio few-nucleon theories and potentials. Finally when combined with an ongoing measurement of the 1S-2S transition in He+, these measurements will lead to an enhanced bound-state QED test of the 1S Lamb shift in He+.