Constraints on the diffuse flux of ultrahigh energy neutrinos from four years of Askaryan Radio Array data in two stations

P. Allison, S. Archambault, J. J. Beatty, M. Beheler-Amass, D. Z. Besson, M. Beydler, C. C. Chen, C. H. Chen, P. Chen, B. A. Clark, W. Clay, A. Connolly, L. Cremonesi, J. Davies, S. De Kockere, K. D. De Vries, C. Deaconu, M. A. Duvernois, E. Friedman, R. GaiorJ. Hanson, K. Hanson, K. D. Hoffman, B. Hokanson-Fasig, E. Hong, S. Y. Hsu, L. Hu, J. J. Huang, M. H. Huang, K. Hughes, A. Ishihara, A. Karle, J. L. Kelley, R. Khandelwal, K. C. Kim, M. C. Kim, I. Kravchenko, K. Kurusu, H. Landsman, U. A. Latif, A. Laundrie, C. J. Li, T. C. Liu, M. Y. Lu, B. Madison, K. Mase, T. Meures, J. Nam, R. J. Nichol, G. Nir, A. Novikov, A. Nozdrina, E. Oberla, A. O'Murchadha, J. Osborn, Y. Pan, C. Pfendner, J. Roth, P. Sandstrom, D. Seckel, Y. S. Shiao, A. Shultz, D. Smith, J. Torres, J. Touart, N. Van Eijndhoven, G. S. Varner, A. G. Vieregg, M. Z. Wang, S. H. Wang, S. A. Wissel, S. Yoshida, R. Young

Research output: Contribution to journalArticlepeer-review

Abstract

The Askaryan Radio Array (ARA) is an ultrahigh energy (UHE, >1017 eV) neutrino detector designed to observe neutrinos by searching for the radio waves emitted by the relativistic products of neutrino-nucleon interactions in Antarctic ice. In this paper, we present constraints on the diffuse flux of ultrahigh energy neutrinos between 1016 and 1021 eV resulting from a search for neutrinos in two complementary analyses, both analyzing four years of data (2013-2016) from the two deep stations (A2, A3) operating at that time. We place a 90% CL upper limit on the diffuse all flavor neutrino flux at 1018 eV of EF(E)=5.6×10-16 cm-2 s-1 sr-1. This analysis includes four times the exposure of the previous ARA result and represents approximately 1/5th the exposure expected from operating ARA until the end of 2022.

Original languageEnglish (US)
Article number043021
JournalPhysical Review D
Volume102
Issue number4
DOIs
StatePublished - Aug 15 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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