arxiv: 1803.02719 · v3 · pith:UW2F74T2new · submitted 2018-03-07 · 🌌 astro-ph.HE · astro-ph.IM· hep-ex

Constraints on the diffuse high-energy neutrino flux from the third flight of ANITA

P. W. Gorham , P. Allison , O. Banerjee , L. Batten , J. J. Beatty , K. Bechtol , K. Belov , D. Z. Besson

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W. R. Binns V. Bugaev P. Cao C. C. Chen C. H. Chen P. Chen J. M. Clem A. Connolly L. Cremonesi B. Dailey C. Deaconu P. F. Dowkontt B. D. Fox J. W. H. Gordon C. Hast B. Hill S. Y. Hsu J. J. Huang K. Hughes R. Hupe M. H. Israel K. M. Liewer T. C. Liu A. B. Ludwig L. Macchiarulo S. Matsuno C. Miki K. Mulrey J. Nam C. Naudet R. J. Nichol A. Novikov E. Oberla S. Prohira B. F. Rauch J. M. Roberts A. Romero-Wolf B. Rotter J. W. Russell D. Saltzberg D. Seckel H. Schoorlemmer J. Shiao S. Stafford J. Stockham M. Stockham B. Strutt M. S. Sutherland G. S. Varner A. G. Vieregg S. H. Wang S. A. Wissel

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classification 🌌 astro-ph.HE astro-ph.IMhep-ex

keywords anitaflightneutrinoanalysesbackgroundemissioneventradio

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The Antarctic Impulsive Transient Antenna (ANITA), a NASA long-duration balloon payload, searches for radio emission from interactions of ultra-high-energy neutrinos in polar ice. The third flight of ANITA (ANITA-III) was launched in December 2014 and completed a 22-day flight. We present the results of three analyses searching for Askaryan radio emission of neutrino origin. In the most sensitive of the analyses, we find one event in the signal region on an expected a priori background of $0.7^{+0.5}_{-0.3}$. Though consistent with the background estimate, the candidate event remains compatible with a neutrino hypothesis even after additional post-unblinding scrutiny.

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Constraints on the diffuse high-energy neutrino flux from the third flight of ANITA

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