UHE tau neutrino flux regeneration while skimming the Earth

Abstract

The detection of Earth-skimming tau neutrinos has turned into a very promising strategy for the observation of ultra-high energy cosmic neutrinos. The sensitivity of this channel crucially depends on the parameters of the propagation of the tau neutrinos through the terrestrial crust, which governs the flux of emerging tau leptons that can be detected. One of the characteristics of this propagation is the possibility of regeneration through multiple ${\nu }_{\tau }\leftrightarrow \tau$ conversions, which are often neglected in the standard picture. In this paper, we solve the transport equations governing the ${\nu }_{\tau }$ propagation and compare the flux of emerging tau leptons obtained allowing regeneration or not. We discuss the validity of the approximation of neglecting the ${\nu }_{\tau }$ regeneration using different scenarios for the neutrino-nucleon cross-sections and the tau energy losses.

8 pages, 8 figures

References in corpus (2)

• Charged Current Neutrino Cross Section and Tau Energy Loss at Ultra-High Energies
• Tau energy losses at ultra-high energy: continuous versus stochastic treatment

Cited by in corpus (10)

• A Comprehensive Approach to Tau-Lepton Production by High-Energy Tau Neutrinos Propagating Through Earth
• Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
• Ultra-High-Energy Tau Neutrino Cross Sections with GRAND and POEMMA
• Neutrino propagation in the Earth and emerging charged leptons with $\text{nuPyProp}$
• Near-future discovery of point sources of ultra-high-energy neutrinos
• Tau Appearance from High-Energy Neutrino Interactions
• Final state radiation from high and ultrahigh energy neutrino interactions
• Neutrino Detection with the Surface Array of the Pierre Auger Observatory
• Alouette: Yet another encapsulated TAUOLA, but revertible
• The propagation of ultra-high energy tau leptons and neutrinos while skimming the Earth