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Communication Dans Un Congrès Journal of Physics: Conference Series Année : 2011

The proton radius puzzle

Andreas Dax
  • Fonction : Auteur
Satish Dhawan
  • Fonction : Auteur
Paul Indelicato
Yi-Wei Liu
  • Fonction : Auteur
François Nez
Catherine Schwob
  • Fonction : Auteur
  • PersonId : 857350
  • IdRef : 176303456

Résumé

By means of pulsed laser spectroscopy applied to muonic hydrogen (mu(-)p) we have measured the 2S(1/2)(F=1) - 2P(3/2)(F=2) transition frequency to be 49881.88(76) GHz [1]. By comparing this measurement with its theoretical prediction [2, 3, 4, 5, 6, 7] based on bound-state QED we have determined a proton radius value of r(p) = 0.84184(67) fm. This new value differs by 5.0 standard deviations from the CODATA value of 0.8768(69) fm [8], and 3 standard deviation from the e-p scattering results of 0.897(18) fm [9]. The observed discrepancy may arise from a computational mistake of the energy levels in mu p or H, or a fundamental problem in bound-state QED, an unknown effect related to the proton or the muon, or an experimental error.

Dates et versions

hal-00698994 , version 1 (18-05-2012)

Identifiants

Citer

Aldo Antognini, Randolf Pohl, Fernando D. Amaro, François Biraben, Joao M. R. M. R. Cardoso, et al.. The proton radius puzzle. International Nuclear Physics Conference, Jul 2010, Vancouver, Canada. pp.032002, ⟨10.1088/1742-6596/312/3/032002⟩. ⟨hal-00698994⟩
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