Current quark mass dependence of nucleon magnetic moments and radii

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 Poincare' 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.

23 pages, 2 figures, 4 tables, 4 appendices

References in corpus (7)

• Enhanced effect of temporal variation of the fine structure constant in diatomic molecules
• Hadron Properties and Dyson-Schwinger Equations
• Vector meson form factors and their quark-mass dependence
• Dependence of nuclear binding on hadronic mass variation
• Dynamical chiral symmetry breaking and a critical mass
• Variation of fundamental constants: theory and observations
• Chiral extrapolation of nucleon magnetic form factors

Cited by in corpus (4)

• Delta-baryon mass in a covariant Faddeev approach
• Delta properties in the rainbow-ladder truncation of Dyson-Schwinger equations
• Constraints on the Variation of Physical Constants, Equivalence Principle Violation, and a Fifth Force from Atomic Experiments
• Variation of the quadrupole hyperfine structure and nuclear radius due to an interaction with scalar and axion dark matter