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Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA.
A fourth steeply upward-pointing ANITA-I CR-like radio event which has characteristics consistent with a primary that emerged from the surface of the ice suggests a possible τ-lepton decay as the origin of this event, but such an interpretation would require significant suppression of the standard model τ-neutrino cross section. Expand
Constraints on Cosmic Neutrino Fluxes from the ANITA Experiment
P. F. Dowkontt, 4 M. A. DuVernois,5 P. A. Evenson, 6 D. Goldstein, 1 P. W. Gorham, 9 C. L. Hebert, 9 M. H. Israel,4 J. G. Learned, 9 K. M. Liewer,10 J. T. Link,9 S. Matsuno, 9 P. Miočinović,9 J. Nam,… Expand
Observation of ultrahigh-energy cosmic rays with the ANITA balloon-borne radio interferometer.
Measurements in the 300-900 MHz range are presented, which are the first self-triggered, first ultrawide band, first far-field, and the highest energy sample of cosmic ray events collected with the radio technique. Expand
Observations of the Askaryan effect in ice.
This is the first observation of the Askaryan effect in ice, and measures for the first time the large-scale angular dependence of the radiation pattern, a major factor in determining the solid-angle acceptance of ultrahigh-energy neutrino detectors. Expand
New limits on the ultrahigh energy cosmic neutrino flux from the ANITA experiment.
Upper limits derived from the analysis rule out the highest cosmogenic neutrino models, as six events consistent with radio impulses from ultrahigh energy extensive air showers are detected in a background horizontal-polarization channel. Expand
Status of ANITA and ANITA-lite
We describe a new experiment to search for neutrinos with energies above 3 × 1018 eV based on the observation of short duration radio pulses that are emitted from neutrino-initiated cascades. The… Expand
Initial results from the ANITA 2006-2007 Balloon Flight
We report initial results of the Antarctic Impulsive Transient Antenna (ANITA) 2006-2007 Long Duration Balloon flight, which searched for evidence of the flux of cosmogenic neutrinos. ANITA flew for… Expand
Constraints on cosmic neutrino fluxes from the Antarctic Impulsive Transient Antenna experiment.
We report new limits on cosmic neutrino fluxes from the test flight of the Antarctic Impulsive Transient Antenna (ANITA) experiment, which completed an 18.4 day flight of a prototype long-duration… Expand
In situ radioglaciological measurements near Taylor Dome, Antarctica and implications for ultra-high energy (UHE) neutrino astronomy
Abstract Radiowave detection of the Cherenkov radiation produced by neutrino-ice collisions requires an understanding of the radiofrequency (RF) response of cold polar ice. We herein report on a… Expand
Detection of Ultra High Energy Neutrinos via Coherent Radio Emission
Since the 1960’s it has been predicted that cosmic ray protons of the highest energies must produce corresponding high energy neutrinos due to collisions with the cosmic microwave background. Both… Expand