Speaker
Description
The ANtarctic Impulsive Transient Antenna (ANITA), a NASA long-duration balloon
payload completed its fourth flight in December 2016 with 28 days of flight
time. We present the results of two separate blind analyses searching for
Askaryan radio emission in the polar ice from ultra-high-energy neutrino
interactions. The more sensitive analysis, with a better expected limit, had a
background estimate of $0.6^{+0.69}_{-0.45}$ and an analysis efficiency of $82
\pm 2\%$. Each analysis found one event in the signal region, consistent with
the background estimate. Combining the limit from the more sensitive of these
analyses with previous ANITA limits, we place the strongest constraints on the
ultra-high-energy diffuse neutrino flux at energies between $10^{19.5}$ eV and
$10^{23}$ eV.
Mini-abstract
ANITA sets the tightest constraint on the ultra-high-energy neutrino flux above $10^{19.5}$ eV.
| Experiment/Collaboration | ANtarctic Impulsive Transient Antenna |
|---|