Non-spherical proton shape and hydrogen hyperfine splitting

Abstract

We show that the non-spherical charge distribution of the proton manifests itself in hydrogen hyperfine splitting as an increase (in absolute value) of the proton Zemach radius and polarization contributions.

10 pages, 4 figures, Paper presented at the International Conference on Precision Physics of Simple Atomic Systems, University of Windsor, Windsor, Canada, 21-26 July 2008

References in corpus (8)

• Unitary Isobar Model - MAID2007
• Electromagnetic excitation of the Delta(1232)-resonance
• Measurement of the N to Delta(1232) Transition at High Momentum Transfer by pi0 Electroproduction
• Quadrupole moments of baryons
• Baryon octupole moments
• Ovrview: The Shape of Hadrons
• New experimental constraints on polarizability corrections to hydrogen hyperfine structure
• Charge form factors and nucleon shape

Cited by in corpus (8)

• Electromagnetic Transition Form Factors of Baryon Resonances
• Forward doubly-virtual Compton scattering off the nucleon in chiral perturbation theory: II. Spin polarizabilities and moments of polarized structure functions
• Parametrizations of the ${\gamma }^{\ast }N\to \Delta (1232)$ quadrupole form factors and Siegert's theorem
• Improved empirical parametrizations of the ${\gamma }^{\ast }N\to \Delta (1232)$ and ${\gamma }^{\ast }N\to N(1520)$ helicity amplitudes and the Siegert's theorem
• New low-$Q^2$ measurements of the ${\gamma }^{\ast }N\to \Delta (1232)$ Coulomb quadrupole form factor, pion cloud parametrizations and Siegert's theorem
• $\Delta (1232)$-Resonance in the Hydrogen Spectrum
• Electromagnetic multipole moments of baryons
• Combined parametrization of the neutron electric form factor and the ${\gamma }^{\ast }N\to \Delta (1232)$ quadrupole form factors