Few-Body Systems

, Volume 42, Issue 1–4, pp 91–113 | Cite as

Current quark-mass dependence of nucleon magnetic moments and radii

  • I. C. Cloët
  • G. Eichmann
  • V. V. Flambaum
  • C. D. Roberts
  • M. S. Bhagwat
  • A. Höll
Article

Abstract

A calculation of the current quark-mass dependence of nucleon static electromagnetic properties is necessary in order to use observational data as a means to place constraints on the variation of Nature’s fundamental parameters. A Poincaré-covariant Faddeev equation, which describes baryons as composites of confined quarks and nonpointlike diquarks, is used to calculate this dependence. The results indicate that, like observables dependent on the nucleons’ magnetic moments, quantities sensitive to their magnetic and charge radii, such as the energy levels and transition frequencies in hydrogen and deuterium, might also provide a tool with which to place limits on the allowed variation in Nature’s constants.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • I. C. Cloët
    • 1
  • G. Eichmann
    • 1
    • 2
  • V. V. Flambaum
    • 3
    • 4
  • C. D. Roberts
    • 1
  • M. S. Bhagwat
    • 1
  • A. Höll
    • 5
  1. 1.Physics DivisionArgonne National LaboratoryArgonneUSA
  2. 2.Institut für PhysikKarl-Franzens-UniversitätGrazAustria
  3. 3.Argonne Fellow, Physics DivisionArgonne National LaboratoryArgonneUSA
  4. 4.School of Physics, University of New South WalesSydneyAustralia
  5. 5.Institut für PhysikUniversität RostockRostockGermany

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