The size of the proton and the deuteron - Archive ouverte HAL
Article Dans Une Revue Journal of Physics: Conference Series Année : 2011

The size of the proton and the deuteron

Satish Dhawan
  • Fonction : Auteur
Paul Indelicato
Paul Knowles
  • Fonction : Auteur
Livia Ludhova
  • Fonction : Auteur
François Nez
Joaquim M F dos Santos
  • Fonction : Auteur
Lukas A Schaller
  • Fonction : Auteur
Karsten Schuhmann
  • Fonction : Auteur

Résumé

We have recently measured the 2S1/2F=1 − 2P3/2F = 2 energy splitting in the muonic hydrogen atom μp to be 49881.88 (76) GHz. Using recent QED calculations of the fine-, hyperfine, QED and finite size contributions we obtain a root-mean-square proton charge radius of rp = 0.84184 (67) fm. This value is ten times more precise, but 5 standard deviations smaller, than the 2006 CODATA value of rp = 0.8768 (69) fm. The source of this discrepancy is unknown. Using the precise measurements of the 1S-2S transition in regular hydrogen and deuterium and our value of rp we obtain improved values of the Rydberg constant, R∞ = 10973731.568160 (16) m−1and the rms charge radius of the deuteron rd = 2.12809 (31) fm.

Dates et versions

hal-00699025 , version 1 (18-05-2012)

Identifiants

Citer

Randolf Pohl, Fernando D Amaro, Aldo Antognini, François Biraben, João M R Cardoso, et al.. The size of the proton and the deuteron. Journal of Physics: Conference Series, 2011, 264, pp.012008. ⟨10.1088/1742-6596/264/1/012008⟩. ⟨hal-00699025⟩
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