Speaker
Jonathan Charlesworth
(UWA)
Description
We utilise an effective-current framework for electromagnetic dipole generation to recover the axion-induced oscillating electric dipole moment of a static magnetic dipole $\vec{d}_a(t) = -\frac{g_{a\gamma\gamma} a(t)}{c} \vec{m}$. We extend this approach to more general axion-electromagnetic couplings, yielding oscillating electric and magnetic dipole moments $\vec{d}_a(t) = g_{aEM}a(t) \vec{d} - \frac{g_{a\gamma\gamma} a(t) }{c} \vec{m}$ and $\vec{m}_a(t) = g_{aEM} a(t) \vec{m} - c g_{aMM}a(t) \vec{d}$, respectively. These dipole moments and their associated near fields are not suppressed by the axion mass, whereas far-field effects, such as emitted radiation, are suppressed.
| Primary Abstract Topic | Theory: Axions and Wave-Like-DM |
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Author
Jonathan Charlesworth
(UWA)
Co-authors
Jeremy Bourhill
Michael Tobar
(The University of Western Australia)