Gorham, PW;
Allison, P;
Barwick, SW;
Beatty, JJ;
Besson, DZ;
Binns, WR;
Chen, C;
... ANITA Collaboration; + view all
(2009)
New Limits on the Ultrahigh Energy Cosmic Neutrino Flux from the ANITA Experiment.
PHYS REV LETT
, 103
(5)
, Article 051103. 10.1103/PhysRevLett.103.051103.
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Abstract
We report initial results of the first flight of the Antarctic Impulsive Transient Antenna (ANITA-1) 2006-2007 Long Duration Balloon flight, which searched for evidence of a diffuse flux of cosmic neutrinos above energies of E-nu similar or equal to 3 x 10(18) eV. ANITA-1 flew for 35 days looking for radio impulses due to the Askaryan effect in neutrino-induced electromagnetic showers within the Antarctic ice sheets. We report here on our initial analysis, which was performed as a blind search of the data. No neutrino candidates are seen, with no detected physics background. We set model-independent limits based on this result. Upper limits derived from our analysis rule out the highest cosmogenic neutrino models. In a background horizontal-polarization channel, we also detect six events consistent with radio impulses from ultrahigh energy extensive air showers.
Type: | Article |
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Title: | New Limits on the Ultrahigh Energy Cosmic Neutrino Flux from the ANITA Experiment |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevLett.103.051103 |
Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.103.051103 |
Language: | English |
Additional information: | © 2009 The American Physical Society |
Keywords: | RAY AIR-SHOWERS, COHERENT RADIO EMISSION, SPECTRUM, DETECTOR, CHARGE |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences 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.ucl.ac.uk/id/eprint/152389 |
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