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SUMMARY:Summer Students 2026: Searching for Axion Ultralight Dark Matter w
 ith Terrestrial Electromagnetic Signals
DTSTART:20261007T110000Z
DTEND:20261007T120000Z
DTSTAMP:20261001T165600Z
UID:indico-event-2687@indico.ifae.es
DESCRIPTION:Speakers: Martí Abella Cortés\, Fatih Žgalj\n\nAxions are h
 ypothetical particles that can make up dark matter and\, through a couplin
 g to photons\, interact with the Earth’s geomagnetic field. This interac
 tion induces oscillating electromagnetic fields\, offering a way to search
  for axion dark matter by using the Earth itself as a natural detector. Ho
 wever\, this terrestrial signal can be significantly modified by the densi
 ty of the Earth if the axion also couples to matter. In this talk\, we int
 roduce the basic idea behind this dark matter signature and show how Earth
 's density affects it. In particular\, we show that the induced electric f
 ield can be substantially larger than the magnetic field\, contrary to man
 y typical scenarios. We then discuss how this signal can be searched for b
 y using terrestrial electromagnetic measurements and present constraints o
 n the axion-photon coupling obtained by focusing on the electric-field com
 ponent. This provides a complementary approach to existing searches based 
 on geomagnetic signals and offers another handle on the hunt for dark matt
 er.\n\nhttps://indico.ifae.es/event/2687/
LOCATION:IFAE Seminar Room (In-person)
URL:https://indico.ifae.es/event/2687/
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