Effects of quantum decoherence in a future supernova neutrino detection

This repository is destinated to calculate propagation and detection of supernova (SN) neutrinos until Earth considering the impact of quantum decoherence (open quantum systems formalism), as described in the Physical Review D publication Effects of quantum decoherence in a future supernova neutrino detection.

It was created a system that generates statistical chi-square profiles and contours just running the file run_and_minimize_chi_square.py. This system and its files are described as follows (in order of importation):

• run_and_minimize_chi_square.py: initial file (to be run). Here you find the selected options of analysis and also the iminuit (Minuit) minimization functions;

• menu.py: is an auxiliary file that is responsible for generating a menu and saving the options in the config_list variable;

• chi_square.py: it has the chi-square functions for DUNE and HK and also the combined quantum decoherence effects. The same is valid for chi_square_Pee.py (used to calculate statistical limits on a free constant Pee);

• rate.py: events rate for quantum decoherence parameters (same is valid for rate_Pee.py, but as said above, for a different kind of analysis).

• flavor_conversion.py: this file has most of standard and non-standard mixing probabilities;

• interaction.py: meets the cross-section functions;

• fluxes.py: has the functions that collect Garching fluxes from simulations;

There are some other files that are not directly part of this chain (system) but are important:

• create_tables.py: generate tables of the database used to save results;

• Pij_sn.py (and Pij_sn_loss.py): save the probability of a neutrino i goes to a j in SN matter profile in a compiled file into compiled_numba folder;

The results are saved into database files in the data folder and also in the results folder in .npy format.

The IPython notebooks regeneration.ipynb describe in detail the solution of standard (and non-standard) neutrino mixing at Earth.

The files with subscript _loss regard a test over a different model of neutrino loss along propagation. Files without this subscript will concern mass state coupling scenario.

Different choices of zenith were calculated in order to quantify regeneration effects. Angles between 270 and 90 degrees will not suffer Earth matter effects. The angles 120, 140, 160, and 180 were chosen for DUNE, then the zenith for HK and JUNO were calculated in the DUNE longitude. In this way, there are situations where DUNE has Earth matter effects but the other detectors do not and the opposite is also true.

Sensible data, usually made available from other research groups was omitted in the data folder, which can make the task of reproducing the findings of the repository impracticable. Make contact with the repository manager (santosmv) to have more information on access to such data.