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Article Dans Une Revue Canadian Journal of Physics Année : 2011

The Lamb shift in muonic hydrogen

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

Résumé

The long quest for a measurement of the Lamb shift in muonic hydrogen is over. Last year we measured the energy splitting (Pohl et al., Nature, 466, 213 (2010)) in mu p with an experimental accuracy of 15 ppm, twice better than our proposed goal. Using current QED calculations of the fine, hyperfine, QED, and finite size contributions, we obtain a root-mean-square proton charge radius of r(p) = 0.841 84 (67) fm. This value is 10 times more precise, but 5 standard deviations smaller, than the 2006 CODATA value of r(p). The origin of this discrepancy is not known. Our measurement, together with precise measurements of the 1S-2S transition in regular hydrogen and deuterium, gives improved values of the Rydberg constant, R(infinity) = 10 973 731.568 160 (16) m(-1) and the rms charge radius of the deuteron r(d) = 2.128 09 (31) fm.

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Dates et versions

hal-00698510 , version 1 (16-05-2012)

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Randolf Pohl, Aldo Antognini, François Nez, Fernando D. Amaro, François Biraben, et al.. The Lamb shift in muonic hydrogen. Canadian Journal of Physics, 2011, 89, pp.37. ⟨10.1139/P10-109⟩. ⟨hal-00698510⟩
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