An upper limit on the electron-neutrino flux from the HiRes detector

R. U. Abbasi , T. Abu-Zayyad , M. Allen , J. F. Amann , G. Archbold , K. Belov , J. W. Belz , S. Y. Ben Zvi

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D. R. Bergman A. Biesiadecka S. A. Blake J. H. Boyer O. A. Brusova G. W. Burt C. Cannon Z. Cao W. Deng Y. Fedorova J. Findlay C. B. Finley R. C. Gray W. F. Hanlon C. M. Hoffman M. H. Holzscheiter G. Hughes P. Huentemeyer D. Ivanov B. F Jones C. C. H. Jui K. Kim M. A. Kirn B. C. Knapp E. C. Loh M. M. Maestas N. Manago E. J. Mannel L. J. Marek K. Martens J. A. J. Matthews J. N. Matthews S. A. Moore A. O'Neill C. A. Painter L. Perera K. Reil R. Riehle M. D. Roberts D. Rodriguez M. Sasaki S. R. Schnetzer L. M. Scott M. Seman G. Sinnis J. D. Smith R. Snow P. Sokolsky C. Song R. W. Springer B. T. Stokes S. R. Stratton J. R. Thomas S. B. Thomas G. B. Thomson D. Tupa L. R. Wiencke A. Zech X. Zhang

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classification 🌌 astro-ph

keywords showersdetectorelectron-neutrino-inducedenergyupward-goingcrosseartheffect

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Air-fluorescence detectors such as the High Resolution Fly's Eye (HiRes) detector are very sensitive to upward-going, Earth-skimming ultrahigh energy electron-neutrino-induced showers. This is due to the relatively large interaction cross sections of these high-energy neutrinos and to the Landau-Pomeranchuk-Migdal (LPM) effect. The LPM effect causes a significant decrease in the cross sections for bremsstrahlung and pair production, allowing charged-current electron-neutrino-induced showers occurring deep in the Earth's crust to be detectable as they exit the Earth into the atmosphere. A search for upward-going neutrino-induced showers in the HiRes-II monocular dataset has yielded a null result. From an LPM calculation of the energy spectrum of charged particles as a function of primary energy and depth for electron-induced showers in rock, we calculate the shape of the resulting profile of these showers in air. We describe a full detector Monte Carlo simulation to determine the detector response to upward-going electron-neutrino-induced cascades and present an upper limit on the flux of electron-neutrinos.

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An upper limit on the electron-neutrino flux from the HiRes detector

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