The Proton Size Puzzle: Testing QED at Extreme Wavelengths

Project Information

QED-PROTONSIZE

Grant agreement ID: 695677

DOI 10.3030/695677

Project closed

EC signature date 9 June 2016

Start date 1 September 2016

End date 31 August 2022

Funded under

• EXCELLENT SCIENCE - European Research Council (ERC)

Total cost € 2 497 664,00

EU contribution € 2 497 664,00

Coordinated by

STICHTING VU
Netherlands

Publications

Peer reviewed articles (8)

Improved ionization and dissociation energies of the deuterium molecule

Author(s): J. Hussels, N. Hölsch, C.-F. Cheng , E. J. Salumbides , H. L. Bethlem , K. S. E. Eikema , Ch. Jungen, M. Beyer , F. Merkt , W. Ubachs
Published in: Physical Review A, Issue 105, 2022, Page(s) 022820, ISSN 2469-9926
Publisher: American Physical Society
DOI: 10.1103/physreva.105.022820

Benchmarking Theory with an Improved Measurement of the Ionization and Dissociation Energies of H2

Author(s): Nicolas Hölsch, Maximilian Beyer, Edcel J. Salumbides, K.S.E. Eikema, Wim Ubachs, Christian Jungen, Frederic Merkt
Published in: Physical Review Letters, Issue 122, 2019, Page(s) 103002, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.122.103002

Ramsey-comb precision spectroscopy in xenon at vacuum ultraviolet wavelengths produced with high-order harmonic generation

Author(s): L. S. Dreissen, C.Roth, E.L. Gründeman, J.J.Krauth, M.G.J.Favier, and K.S.E. Eikema
Published in: Physical Review A, Issue 101, 2020, Page(s) 052509, ISSN 2469-9926
Publisher: American Physical Society
DOI: 10.1103/physreva.101.052509

Proton-electron mass ratio from laser spectroscopy of HD+ at the part-per-trillion level

Author(s): S. Patra, M. Germann, J.-Ph. Karr, M. Haidar, L. Hilico, V. I. Korobov, F. M. J. Cozijn, K. S. E. Eikema, W. Ubachs, J. C. J. Koelemeij
Published in: Science, Issue 369, 2020, Page(s) 1238-1241, ISSN 0036-8075
Publisher: American Association for the Advancement of Science
DOI: 10.1126/science.aba0453

Three-body QED test and fifth-force constraint from vibrations and rotations of HD+

Author(s): M. Germann, S. Patra , J.-Ph. Karr , L. Hilico , V. I. Korobov, E. J. Salumbides, K. S. E. Eikema, W. Ubachs , J.C.J. Koelemeij
Published in: Physical Review Research, Issue 3, 2021, Page(s) L022028, ISSN 2643-1564
Publisher: American Physical Society
DOI: 10.1103/physrevresearch.3.l022028

High-Precision Ramsey-Comb Spectroscopy Based on High-Harmonic Generation

Author(s): L. S. Dreissen, C.Roth, E.L. Gründeman, J.J.Krauth, M.G.J.Favier, and K.S.E. Eikema
Published in: Physical Review Letters, Issue 123, 2019, Page(s) 143001, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.123.143001

Paving the way for fundamental physics tests with singly-ionized helium

Author(s): Julian J. Krauth; L. S. Dreissen; C. Roth; E. L. Gründeman; Mathieu Collombon; Maxime Favier; Kjeld S. E. Eikema
Published in: Proceedings of Science PoS (FFK2019), Issue 353, 2020, Page(s) 1, ISSN 1824-8039
Publisher: Sissa Medialab
DOI: 10.22323/1.353.0049

Determination of the Interval between the Ground States of Para- and Ortho- H2

Author(s): M. Beyer, N. Hölsch, J. Hussels, C.-F. Cheng, E. J. Salumbides, K. S. E. Eikema, W. Ubachs , Ch. Jungen, F. Merkt
Published in: Physical Review Letters, Issue 123, 2019, Page(s) 163002, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.123.163002