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General CPT-even dimension-five nonminimal couplings between fermions and photons yielding EDM and MDM
In this letter, we examine a new class of CPT-even nonminimal interactions,
between fermions and photons, deprived of higher order derivatives, that yields
electric dipole moment (EDM) and magnetic dipole moment (MDM) in the context of
the Dirac equation. The couplings are dimension-five CPT-even and
Lorentz-violating nonminimal structures, composed of a rank-2 tensor,
, the electromagnetic tensor, and gamma matrices, being addressed
in its axial and non-axial Hermitian versions, and also comprising general
possibilities. We then use the electron's anomalous magnetic dipole moment and
electron electric dipole moment measurements to reach upper bounds of part
in and (eV )
Electron-Electron Bound States in Maxwell-Chern-Simons-Proca QED3
We start from a parity-breaking MCS QED model with spontaneous breaking
of the gauge symmetry as a framework for evaluation of the electron-electron
interaction potential and for attainment of numerical values for the e-e bound
state. Three expressions are obtained for the potential according to the
polarization state of the scattered electrons. In an energy scale compatible
with Condensed Matter electronic excitations, these three potentials become
degenerated. The resulting potential is implemented in the Schrodinger equation
and the variational method is applied to carry out the electronic binding
energy. The resulting binding energies in the scale of 10-100 meV and a
correlation length in the scale of 10-30 Angs. are possible indications that
the MCS-QED model adopted may be suitable to address an eventual case of
e-e pairing in the presence of parity-symmetry breakdown. The data analyzed
here suggest an energy scale of 10-100 meV to fix the breaking of the
U(1)-symmetry.
PACS numbers: 11.10.Kk 11.15.Ex 74.20.-z 74.72.-h ICEN-PS-01/17Comment: 13 pages, style revtex, revised versio
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