Gorham, PW;
Nam, J;
Romero-Wolf, A;
Hoover, S;
Allison, P;
Banerjee, O;
Beatty, JJ;
... Wu, F; + view all
(2016)
Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA.
Physical Review Letters
, 117
(7)
, Article 071101. 10.1103/PhysRevLett.117.071101.
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Abstract
We report on four radio-detected cosmic-ray (CR) or CR-like events observed with the Antarctic Impulsive Transient Antenna (ANITA), a NASA-sponsored long-duration balloon payload. Two of the four were previously identified as stratospheric CR air showers during the ANITA-I flight. A third stratospheric CR was detected during the ANITA-II flight. Here, we report on characteristics of these three unusual CR events, which develop nearly horizontally, 20-30 km above the surface of Earth. In addition, we report on 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. This 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.
| Type: | Article |
|---|---|
| Title: | Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.117.071101 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.117.071101 |
| Language: | English |
| Additional information: | © 2016 American Physical Society. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1486406 |
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