Please read these instructions before posting any event on Fermilab Indico

Indico search will be reestablished in the next version upgrade of the software:


This search is only for public events. Restricted events are not available.

June 22, 2020 to July 2, 2020
US/Central timezone

Cosmogenic neutrino fluxes under the effect of active-sterile secret interactions

Not scheduled


Mr Damiano Francesco Giuseppe Fiorillo (University of Naples "Federico II")


We study the observable effects of a secret active-sterile interactions, mediated by a pseudoscalar, on the expected flux of cosmogenic neutrinos. The results show that for masses of sterile neutrinos and pseudoscalars of hundreds MeV, necessary to evade cosmological, astrophysical and elementary particle constraints, the presence of such new interactions can significantly change the energy spectrum of cosmogenic neutrinos at Earth in the energy range from PeV to ZeV. Interestingly, the distortion of the spectrum results to be detectable at GRAND apparatus if the scalar mediator mass is around 250 MeV and the UHECRs are dominated by the proton component. Larger mediator masses or a chemical composition of UHECRs dominated by heavier nuclei would require much larger cosmic rays apparatus which might be available in future.


Active-sterile secret interactions can change cosmogenic neutrino spectra

Primary author

Mr Damiano Francesco Giuseppe Fiorillo (University of Naples "Federico II")

Presentation Materials