Analytic Aperture Calculation and Scaling Laws for Radio Detection of Lunar-Target UHE Neutrinos - Astrophysics > Cosmology and Nongalactic AstrophysicsReport as inadecuate




Analytic Aperture Calculation and Scaling Laws for Radio Detection of Lunar-Target UHE Neutrinos - Astrophysics > Cosmology and Nongalactic Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We derive analytic expressions, and approximate them in closed form, for theeffective detection aperture for Cerenkov radio emission from ultra-high-energyneutrinos striking the Moon. The resulting apertures are in good agreement withrecent Monte Carlo simulations and support the conclusion of James and Protheroe2009that neutrino flux upper limits derived from the GLUE search Gorham etal.2004 were too low by an order of magnitude. We also use our analyticexpressions to derive scaling laws for the aperture as a function ofobservational and lunar parameters. We find that at low frequenciesdownward-directed neutrinos always dominate, but at higher frequencies, thecontribution from upward-directed neutrinos becomes increasingly important,especially at low neutrino energies. Detecting neutrinos from Earth near theGZK regime will likely require radio telescope arrays with extremely largecollecting area and hundreds of hour of exposure time. Higher energy neutrinosare most easily detected using lower frequencies. Lunar surface roughness is adecisive factor for obtaining detections at higher frequencies and higherenergies.



Author: K. G. Gayley, R. L. Mutel, T. R. Jaeger

Source: https://arxiv.org/







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