https://doi.org/10.1140/epjc/s10052-024-12423-3
Special - Tools for Experiment and Theory
PEANUTS: a software for the automatic computation of solar neutrino flux and its propagation within Earth
1
Institute for Theoretical Particle Physics (TTP), Karlsruhe Institute of Technology (KIT), 76128, Karlsruhe, Germany
2
Institute for Theoretical Particle Physics and Cosmology (TTK), RWTH Aachen University, 52056, Aachen, Germany
3
Dipartimento di Fisica e Astronomia, Università di Bologna, via Irnerio 46, 40126, Bologna, Italy
4
INFN, Sezione di Bologna, viale Berti Pichat 6/2, 40127, Bologna, Italy
Received:
19
June
2023
Accepted:
10
January
2024
Published online:
5
February
2024
We present PEANUTS (Propagation and Evolution of Active NeUTrinoS), an open-source Python package for the automatic computation of solar neutrino spectra and active neutrino propagation through Earth. PEANUTS is designed to be fast, by employing analytic formulae for the neutrino propagation through varying matter density, and flexible, by allowing the user to input arbitrary solar models, custom Earth density profiles and general detector locations. It provides functionalities for a fully automated simulation of solar neutrino fluxes at a detector, as well as access to individual routines to perform more specialised computations. The software has been extensively tested against the results of the SNO experiment, providing excellent agreement with their results. In addition, the present text contains a pedagogical derivation of the relations needed to compute the oscillated solar neutrino spectra, neutrino propagation through Earth and nadir exposure of an experiment.
© The Author(s) 2024
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