Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Neutrino Astronomy & Physics (NU)
Progress Towards a Diffuse Neutrino Search in the Full Livetime of the Askaryan Radio Array
Presented by P. Dasgupta* and M.S. Muzio on behalf of  on behalf of the ARA Collaboration, S. Ali, P. Allison, S. Archambault, J.J. Beatty, D.Z. Besson, A. Bishop, P. Chen, Y.C. Chen, B.A. Clark, W. Clay, A. Connolly, K. Couberly, L. Cremonesi, A.C. Cummings, P. Dasgupta, R. Debolt, S. De Kockere, K.D. de Vries, C. Deaconu, M. A, J. Flaherty, E. Friedman, R. Gaior, P. Giri, J. Hanson, N. Harty, B. Hendricks, K.D. Hoffman, J.J. Huang, 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, 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, D.J.B. Smith, 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 and R. Younget al. (click to show)
*: corresponding author
Full text: pdf
Pre-published on: August 17, 2023
Published on: September 27, 2024
Abstract
The Askaryan Radio Array (ARA) is an in-ice ultrahigh energy (UHE, $>10$ PeV) neutrino experiment at the South Pole that aims to detect radio emissions from neutrino-induced particle cascades. ARA has five independent stations which together have collected nearly 24 station-years of data. Each of these stations search for UHE neutrinos by burying in-ice clusters of antennas ${\sim}200$ m deep in a roughly cubical lattice with side length ${\sim}15$ m. Additionally, the fifth ARA station (A5) has a beamforming trigger, referred to as the Phased Array (PA), consisting of a trigger array of 7 tightly packed vertically-polarized antennas. In this proceeding, we will present a neutrino search with the data of this “hybrid” station, emphasizing its capabilities for improved analysis efficiencies, background rejection, and neutrino vertex reconstruction. This is enabled by combining the closely packed trigger antennas with the long-baselines of the outrigger antennas. We will also place the A5 analysis into the context of the broader five station analysis program, including efforts to characterize and calibrate the detector, model and constrain backgrounds, and reject noise across the entire array. We anticipate this full neutrino search to set world-leading limits above 100 PeV, and inform the next generation of neutrino detection experiments.
DOI: https://doi.org/10.22323/1.444.1226
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