Gorham, PW and Allison, P and Barwick, SW and Beatty, JJ and Besson, DZ and Binns, WR and Chen, C and Chen, P and Clem, JM and Connolly, A and Dowkontt, PF and DuVernois, MA and Field, RC and Goldstein, D and Goodhue, A and Hast, C and Hebert, CL and Hoover, S and Israel, MH and Kowalski, J and Learned, JG and Liewer, KM and Link, JT and Lusczek, E and Matsuno, S and Mercurio, BC and Miki, C and Miocinovic, P and Nam, J and Naudet, CJ and Ng, J and Nichol, RJ and Palladino, K and Reil, K and Romero-Wolf, A and Rosen, M and Ruckman, L and Saltzberg, D and Seckel, D and Varner, GS and Walz, D and Wang, Y and Wu, F and ANITA Collaboration, (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 |
|---|---|
| Title: | New Limits on the Ultrahigh Energy Cosmic Neutrino Flux from the ANITA Experiment |
| Open access status: | An open access publication. A version is also 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 > School of Life and Medical Sciences > Faculty of Medical Sciences > Surgery and Interventional Science (Division of) UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy |
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