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CRPropa / CRPropa3

CRPropa is a public astrophysical simulation framework for propagating extraterrestrial ultra-high energy particles. https://crpropa.github.io/CRPropa3/
https://crpropa.desy.de
GNU General Public License v3.0
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Neutrinos low energy #421

Closed RodSasse closed 1 year ago

RodSasse commented 1 year ago

Recently I've been working with simulations using neutrino propagation, as in the example (https://crpropa.github.io/CRPropa3/pages/example_notebooks/secondaries/neutrinos.v4.html). I realized that only high energy neutrinos are saved, as shown in the plot: PlotGitHub

Is it possible to save low energy neutrinos (range of 10e8 eV to 10e15 eV) generated from the propagation of UHECR?

Best, Rodrigo

lukasmerten commented 1 year ago

You can try to lower the MinimumEnergy of your simulations, which might help a bit.

However, I am not sure how photopion production with the CMB and EBL as your photon target fields will generate neutrinos with energies as low as 10^8 eV. As a rough estimate neutrinos from these interactions will receive an energy E=E_prim/20. So for a 10^14 eV neutrino you would expect the primary to have an energy ~20 PeV. However, primaries with such low energies cannot kinematically produce neutrinos for low energy target such as the EBL and CMB.