The Askaryan Radio Array: latest results and ongoing work

Le résumé fourni par la source

The Askaryan Radio Array (ARA) is searching for high-energy neutrinos (>10 PeV) from the cosmos using clusters of antennas buried under the South Pole ice sheet at a maximum depth of 200 m. ARA is looking at the radio Cherenkov emission generated when neutrinos interact with the surrounding medium. The array consists of 5 radio stations, each of them monitoring an independent portion of the ice to maximize the detector effective volume. ARA stations use a combination of vertically polarized (VPol) and horizontally polarized (HPol) antennas, as well as in-ice calibration devices (calpulser) for antenna positioning and ice properties studies. One of the newest ARA stations has been equipped with an independent phased array detector allowing to lower the trigger threshold and consequently improve the array sensitivity at low energies. ARA has been taking data since 2012 and analysis of the full data set is ongoing. In this contribution we present the latest results in the ARA search for cosmic neutrinos, which produced the best limit from an in-ice radio detector above 100 PeV. Additionally we discuss calibration efforts and ongoing work in analysis and reconstruction.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.