Looking at the axionic dark sector with ANITA. (arXiv:1905.10372v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Esteban_I/0/1/0/all/0/1">Ivan Esteban</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Lopez_Pavon_J/0/1/0/all/0/1">Jacobo Lopez-Pavon</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Martinez_Soler_I/0/1/0/all/0/1">Ivan Martinez-Soler</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Salvado_J/0/1/0/all/0/1">Jordi Salvado</a>
The ANITA experiment has recently observed two anomalous events emerging from
well below the horizon. Even though they are consistent with tau cascades, a
high energy Standard Model or Beyond the Standard Model explanation is
challenging and in tension with other experiments. We study under which
conditions the reflection of generic radio pulses can reproduce these signals.
We propose that these pulses can be resonantly produced in the ionosphere via
axion-photon conversion. This naturally explains the direction and polarization
of the events and avoids other experimental bounds.
The ANITA experiment has recently observed two anomalous events emerging from
well below the horizon. Even though they are consistent with tau cascades, a
high energy Standard Model or Beyond the Standard Model explanation is
challenging and in tension with other experiments. We study under which
conditions the reflection of generic radio pulses can reproduce these signals.
We propose that these pulses can be resonantly produced in the ionosphere via
axion-photon conversion. This naturally explains the direction and polarization
of the events and avoids other experimental bounds.
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