Observational constraints on the ultrahigh energy cosmic neutrino flux from the second flight of the ANITA experiment
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Observational constraints on the ultrahigh energy cosmic neutrino flux from the second flight of the ANITA experiment

P. W. Gorham,P. Allison,B. M. Baughman,James Beatty,Konstantin Belov,D. Z. Besson,S. Bevan,W. R. Binns,C. Chen,Pisin Chen,J. M. Clem,A. Connolly,M. Detrixhe,D. De Marco,P. F. Dowkontt,M. DuVernois,E. W. Grashorn,B. Hill,S. Hoover,M. Huang,M. H. Israel,A. Javaid,K. M. Liewer,S. Matsuno,B. C. Mercurio,C. Miki,M. Mottram,J. Nam,Ryan Nichol,K. Palladino,A. Romero-Wolf,L. Ruckman,D. Saltzberg,D. Seckel,G. S. Varner,A. G. Vieregg,Y. Wang;P. W. Gorham;P. Allison;B. M. Baughman;James Beatty;Konstantin Belov;D. Z. Besson;S. Bevan;W. R. Binns;C. Chen;Pisin Chen;J. M. Clem;A. Connolly;M. Detrixhe;D. De Marco;P. F. Dowkontt;M. DuVernois;E. W. Grashorn;B. Hill;S. Hoover;M. Huang;M. H. Israel;A. Javaid;K. M. Liewer;S. Matsuno;B. C. Mercurio;C. Miki;M. Mottram;J. Nam;Ryan Nichol;K. Palladino;A. Romero-Wolf;L. Ruckman;D. Saltzberg;D. Seckel;G. S. Varner;A. G. Vieregg;Y. Wang;
physical review d 2010 Vol. 82 pp. 022004-
302
wang2010physicalobservational

Abstract

The Antarctic Impulsive Transient Antenna (ANITA) completed its second Long Duration Balloon flight in January 2009, with 31 days aloft (28.5 live days) over Antarctica. ANITA searches for impulsive coherent radio Cherenkov emission from 200 to 1200 MHz, arising from the Askaryan charge excess in ultrahigh energy neutrino-induced cascades within Antarctic ice. This flight included significant improvements over the first flight in payload sensitivity, efficiency, and flight trajectory. Analysis of in-flight calibration pulses from surface and subsurface locations verifies the expected sensitivity. In a blind analysis, we find 2 surviving events on a background, mostly anthropogenic, of 0.97±0.42 events. We set the strongest limit to date for 1018–1021 eV cosmic neutrinos, excluding several current cosmogenic neutrino models.

Keywords

models flight cosmic antarctic impulsive neutrino surviving ultrahigh days anita

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DOI:
10.1103/physrevd.82.022004
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https://sciprofiles.com/publication/view/17d5e309c...

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