14:00-15:00 Title: The Ultra-High-Energy Neutrino Spectrum and the LPM Effect An interesting way to observe these absorption dips is by using the moon as detector. The impact of an UHEν on the moon can initiate a particle shower which will emit coherent radiation through the Askaryan effect. This radiation can be detected on Earth by sensitive radio telescopes like LOFAR and SKA, which are currently under development. The cross section for electron bremsstrahlung and electron-positron pair production at these energies and thus the detection probability of the particle shower is however significantly reduced due to the LPM effect. In this presentation I will discuss how the LPM effect alters the particle showers and affects their detection probability. While considering the LPM effect the total number of counts expected in a realistic measurement can be determined, which is already significant for a 30 days measurement by LOFAR. The magnitude of the electric pulses measured at Earth is however only indirectly related to the initial energy of the UHE neutrinos. Considering this, I will as well get into the sensitivity of a realistic measurement to the absorption dips in the spectrum and show whether it will be possible to confirm the existence of the cosmic neutrino background or confirm or refute the Mass Varying Neutrino model in a realistic measurement. |