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arxiv: 1404.5285 · v3 · submitted 2014-04-21 · 🌌 astro-ph.HE · astro-ph.IM

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First Constraints on the Ultra-High Energy Neutrino Flux from a Prototype Station of the Askaryan Radio Array

ARA Collaboration: P. Allison , J. Auffenberg , R. Bard , J. J. Beatty , D. Z. Besson , C. Bora , C.-C. Chen , P. Chen
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A. Connolly J. P. Davies M. A. DuVernois B. Fox P. W. Gorham K. Hanson B. Hill K. D. Hoffman E. Hong L.-C. Hu A. Ishihara A. Karle J. Kelley I. Kravchenko H. Landsman A. Laundrie C.-J. Li T. Liu M.-Y. Lu R. Maunu K. Mase T. Meures C. Miki J. Nam R. J. Nichol G. Nir A. O'Murchadha C. G. Pfendner K. Ratzlaff M. Richman B. Rotter P. Sandstrom D. Seckel A. Shultz J. Stockham M. Stockham M. Sullivan J. Touart H.-Y. Tu G. S. Varner S. Yoshida R. Young
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classification 🌌 astro-ph.HE astro-ph.IM
keywords neutrinoradiodeployedfirstarrayaskaryanconstraintsdepth
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The Askaryan Radio Array (ARA) is an ultra-high energy ($>10^{17}$ eV) cosmic neutrino detector in phased construction near the South Pole. ARA searches for radio Cherenkov emission from particle cascades induced by neutrino interactions in the ice using radio frequency antennas ($\sim150-800$ MHz) deployed at a design depth of 200 m in the Antarctic ice. A prototype ARA Testbed station was deployed at $\sim30$ m depth in the 2010-2011 season and the first three full ARA stations were deployed in the 2011-2012 and 2012-2013 seasons. We present the first neutrino search with ARA using data taken in 2011 and 2012 with the ARA Testbed and the resulting constraints on the neutrino flux from $10^{17}-10^{21}$ eV.

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  1. Sensitivity of the As-Built Askaryan Radio Array to Ultra-High Energy Neutrinos

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    With 2013-2023 exposure, the as-built ARA achieves world-leading UHE neutrino sensitivity above ~10^19 eV and predicts up to 13 trigger-level events under optimistic flux models, with secondaries contributing up to 30...