► High energy muons in neutrino telescopes are accompanied by secondary particles. ► Secondary particles from small energy losses (<0.5GeV) appear almost continuously. ► These particles increase the ...Cherenkov light yield by some ten percent. ► We parametrize the additional light yield and its angular distribution. ► A generic method to calculate the angular photon distribution is presented.
In this work we investigate and parameterize the amount and angular distribution of Cherenkov photons, which are generated by low-energy secondary particles (typically ≲500MeV), which accompany a muon track in water or ice. These secondary particles originate from small energy loss processes. We investigate the contributions of the different energy loss processes as a function of the muon energy and the maximum transferred energy. For the calculation of the angular distribution we have developed a generic transformation method, which allows us to derive the angular distribution of Cherenkov photons for an arbitrary distribution of track directions and their velocities.
In this work we investigate and parameterize the amount and angular distribution of Cherenkov photons which are generated by electro-magnetic cascades in water or ice. We simulate electromagnetic ...cascades with Geant4 for primary electrons, positrons and photons with energies ranging from 1GeV to 10TeV. We parameterize the total Cherenkov-light yield as a function of energy, the longitudinal evolution of the Cherenkov emission along the cascade-axis and the angular distribution of photons. Furthermore, we investigate the fluctuations of the total light yield, the fluctuations in azimuth and changes of the emission with increasing age of the cascade.
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