학술논문
Constraints on the Diffuse Flux of Ultra-High Energy Neutrinos from Four Years of Askaryan Radio Array Data in Two Stations
Document Type
Working Paper
Author
ARA Collaboration; Allison, P.; Archambault, S.; Beatty, J. J.; Beheler-Amass, M.; Besson, D. Z.; Beydler, M.; Chen, C. C.; Chen, C. H.; Chen, P.; Clark, B. A.; Clay, W.; Connolly, A.; Cremonesi, L.; Davies, J.; de Kockere, S.; de Vries, K. D.; Deaconu, C.; Duvernois, M.; Friedman, E.; Gaior, R.; Hanson, J.; Hanson, K.; Hoffman, K. D.; Hokanson-Fasig, B.; Hong, E.; Hsu, S. Y.; Hu, L.; Huang, J. J.; Huang, M. -H.; Hughes, K.; Ishihara, A.; Karle, A.; Kelley, J. L.; Khandelwal, R.; Kim, K. -C.; Kim, M. -C.; Kravchenko, I.; Kurusu, K.; Landsman, H.; Latif, U. A.; Laundrie, A.; Li, C. -J.; Liu, T. -C.; Lu, M. -Y.; Madison, B.; Mase, K.; Meures, T.; Nam, J.; Nichol, R. J.; Nir, G.; Novikov, A.; Nozdrina, A.; Oberla, E.; O'Murchadha, A.; Osborn, J.; Pan, Y.; Pfendner, C.; Roth, J.; Sandstrom, P.; Seckel, D.; Shiao, Y. -S.; Shultz, A.; Smith, D.; Torres, J.; Touart, J.; van Eijndhoven, N.; Varner, G. S.; Vieregg, A. G.; Wang, M. -Z.; Wang, S. -H.; Wissel, S. A.; Yoshida, S.; Young, R.
Source
Phys. Rev. D 102, 043021 (2020)
Subject
Language
Abstract
The Askaryan Radio Array (ARA) is an ultra-high energy (UHE, $>10^{17}$ 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 ultra-high energy neutrinos between $10^{16}-10^{21}$ 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 $10^{18}$ eV of $EF(E)=5.6\times10^{-16}$ $\textrm{cm}^{-2}$$\textrm{s}^{-1}$$\textrm{sr}^{-1}$. This analysis includes four times the exposure of the previous ARA result, and represents approximately 1/5 the exposure expected from operating ARA until the end of 2022.
Comment: 12 pages, 7 figures; Accepted to PRD
Comment: 12 pages, 7 figures; Accepted to PRD