Events Calendar
Exploring the Ultrahigh Energy Universe with ANITA
Tuesday October 27, 2020
| 2:00 pm
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Presenter: | Dr. Cosmin Deaconu (KICP, University of Chicago) |
|---|---|---|
| Series: | Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars | |
| Abstract: |
The ANtarctic Impulsive Transient Antenna (ANITA) experiment is a
balloon-borne broadband radio telescope that flies up to 40 km above Antarctica. Unlike most telescopes, ANITA looks down, seeking to detect the impulsive radio emission expected to be produced from interactions of ultrahigh-energy (>1 EeV) neutrinos in Antarctic ice. Such energetic neutrinos have not yet been detected, but are expected to be produced either in interactions of the ultrahigh-energy cosmic rays (UHECR) with the cosmic microwave background or in astrophysical sources. After four flights, ANITA sets the best constraints on diffuse neutrino flux above 30 EeV and has also constrained fluence from sources. ANITA is also sensitive to radio emission from extensive air showers. Through this channel, ANITA has detected many UHECR candidates as well as several "anomalous" events that appear to be consistent with upward-going air showers. This latter class of events, if not a background, are difficult to explain within the standard model. The successor to ANITA is the Payload for Ultrahigh Energy Observations (PUEO), which will have numerous improvements that the sensitivity by over an order of magnitude. |
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| Host: | Dinesh Loomba | |
| Location: | Zoom | |
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