Octet Baryons in Large Magnetic Fields

Abstract

Magnetic properties of octet baryons are investigated within the framework of chiral perturbation theory. Utilizing a power counting for large magnetic fields, the Landau levels of charged mesons are treated exactly giving rise to baryon energies that depend non-analytically on the strength of the magnetic field. In the small-field limit, baryon magnetic moments and polarizabilities emerge from the calculated energies. We argue that the magnetic polarizabilities of hyperons provide a testing ground for potentially large contributions from decuplet pole diagrams. In external magnetic fields, such contributions manifest themselves through decuplet-octet mixing, for which possible results are compared in a few scenarios. These scenarios can be tested with lattice QCD calculations of the octet baryon energies in magnetic fields.

25 pages, 9 figures

References in corpus (15)

• Physics of Strongly Magnetized Neutron Stars
• Quantum field theory in a magnetic field: From quantum chromodynamics to graphene and Dirac semimetals
• The QCD equation of state in background magnetic fields
• Using effective field theory to analyse low-energy Compton scattering data from protons and light nuclei
• The chiral condensate in a constant electromagnetic field
• Compton scattering from the proton in an effective field theory with explicit Delta degrees of freedom
• Magnetic moments of light nuclei from lattice quantum chromodynamics
• Extracting Nucleon Magnetic Moments and Electric Polarizabilities from Lattice QCD in Background Electric Fields
• Electromagnetic structure of the lowest-lying decuplet resonances in covariant chiral perturbation theory
• Sea contributions to the electric polarizability of the hadrons
• Hadrons in Strong Electric and Magnetic Fields
• The chiral condensate in a constant electromagnetic field at O(p^6)
• Electromagnetic Decay of the ${\Sigma }^0(1385)$ to $\Lambda \gamma$
• Neutron in a Strong Magnetic Field: Finite Volume Effects
• Dynamical Polarizabilities of SU(3) Octet of Baryons