AN UPPER LIMIT ON THE ELECTRON-NEUTRINO FLUX FROM THE HiRes DETECTOR
نویسندگان
چکیده
Air-fluorescence detectors such as the High Resolution Fly’s Eye (HiRes) detector are very sensitive to upwardgoing, Earth-skimming ultra-high-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 chargedcurrent 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 data set 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 electronneutrino-induced cascades and present an upper limit on the flux of electron neutrinos. Subject headinggs: acceleration of particles — cosmic rays — large-scale structure of universe — neutrinos Online material: color figure
منابع مشابه
30TH INTERNATIONAL COSMIC RAY CONFERENCE An upper limit on the electron-neutrino flux from the HiRes instrument
Air-fluorescence detectors such as the High Resolution Fly’s Eye (HiRes) instrument 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 LandauPomeranchuk-Migdal (LPM) effect. The LPM effect is responsible for a significant decrease in the cr...
متن کاملar X iv : 0 80 3 . 05 54 v 1 [ as tr o - ph ] 4 M ar 2 00 8 An upper limit on the electron - neutrino flux from the HiRes detector
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-PomeranchukMigdal (LPM) effect. The LPM effect causes a significant decrease in the cross sections f...
متن کاملar X iv : 0 80 3 . 05 54 v 2 [ as tr o - ph ] 3 J un 2 00 8 An upper limit on the electron - neutrino flux from the HiRes detector
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-PomeranchukMigdal (LPM) effect. The LPM effect causes a significant decrease in the cross sections f...
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