Progress towards an array-wide diffuse UHE neutrino search with the Askaryan Radio Array
M.S. Muzio*,
S. Ali,
P. Allison,
S. Archambault,
J.J. Beatty,
D.Z. Besson,
A. Bishop, P. Chen, Y.C. Chen, Y.C. Chen, B.A. Clark, A. Connolly, K. Couberly, L. Cremonesi, A.C. Cummings, P. Dasgupta, R. Debolt, S. De Kockere, K.D. de Vries, C. Deaconu, M.A. DuVernois, J. Flaherty, E. Friedman, R. Gaior, P. Giri, J. Hanson, N. Harty, K.D. Hoffman, M.H.A. Huang, K. Hughes, A. Ishihara, A. Karle, J.L. Kelley, K.C. Kim, M.C. Kim, I. Kravchenko, R. Krebs, C.Y. Kuo, K. Kurusu, U.A. Latif, C.H. Liu, T.C. Liu, W. Luszczak, K. Mase, M.S. Muzio, J. Nam, R.J. Nichol, A. Novikov, A. Nozdrina, E. Oberla, Y. Pan, C. Pfendner, N. Punsuebsay, J. Roth, A. Salcedo-Gomez, D. Seckel, M.F.H. Seikh, Y.S. Shiao, S.C. Su, S. Toscano, J. Torres, J. Touart, N. van Eijndhoven, G.S. Varner, A. Vieregg, M.Z. Wang, S.H. Wang, S.A. Wissel, C. Xie, S. Yoshida, R. Young on behalf of the ARA Collaborationet al. (click to show)*: corresponding author
Published on:
November 07, 2024
Abstract
The Askaryan Radio Array (ARA) is an in-ice ultrahigh energy (UHE) neutrino experiment at the South Pole. ARA aims to detect the radio emissions from neutrino-induced particle showers using in-ice clusters of antennas buried ${\sim}200$ m deep on a roughly cubical lattice with side length of ${\sim}10$ m. ARA has five such independent stations which have collectively accumulated ${\sim}30$ station-years of livetime through 2023. The fifth station of ARA has an additional sub-detector, known as the phased array, which pioneered an interferometric trigger constructed by beamforming the signals of $7$ tightly packed, vertically-polarized antennas. This scheme has been demonstrated to significantly improve the trigger efficiency for low SNR signals. In this talk, we will present the current state of the first array-wide diffuse neutrino search using $24$ station-years of data (through 2021). We anticipate that this analysis will result in the first UHE neutrino observation or world-leading limits from a radio neutrino detector below $100$ EeV. Additionally, this analysis will demonstrate the feasibility for multi-station in-ice radio arrays to successfully conduct an array-wide neutrino search --- paving the way for future, large detector arrays such as RNO-G and IceCube-Gen2 Radio.
DOI: https://doi.org/10.22323/1.470.0007
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