Propagation of UHECRs in cosmological backgrounds: some results from SimProp

TL;DR

This paper introduces SimProp, a one-dimensional simulation tool for modeling the propagation of ultra-high-energy cosmic ray nuclei in cosmological backgrounds, validating its accuracy and applying it to predict neutrino fluxes in astrophysical scenarios.

Contribution

The paper presents the development and validation of SimProp, a novel simulation code for UHECR propagation, and demonstrates its application to neutrino flux predictions based on astrophysical models.

Findings

SimProp accurately models UHECR propagation in cosmological backgrounds.

Predicted neutrino fluxes align with certain astrophysical scenarios.

The code provides a useful tool for interpreting UHECR experimental data.

Abstract

Ultra-High-Energy Cosmic Ray (UHECR) nuclei propagating in cosmological radiation backgrounds produce secondary particles detectable at Earth. SimProp is a one dimensional code for extragalactic propagation of UHECR nuclei, inspired by the kinetic approach of Aloisio et al. As in this approach, only a subset of nuclei and nuclear channels are used as representative. We discuss the validation of the code and present applications to UHECR experimental results. In particular we present the expected fluxes of neutrinos produced in some astrophysical scenario.