Neutrino oscillations are one of the most representative cases of physics beyond the Standard Model of elementary particles. Although this behavior has been established to be induced by neutrino mass difference (standard oscillations), anomalies observed in experimental data may be explained by non-standard physics, sub-leading to standard oscillations. Different non-standard physics scenarios are currently being considered, with no clear distinction in their modification of expected neutrino oscillation data, or established nature’s preference for either of them. This work proposes the analysis of statistics and/or values which result from fitting models to data, to evaluate the potential distinction among them. In particular, we focus on Non-Standard Interactions (NSI) of neutrinos with matter, evaluated in the context of the DUNE experiment (Deep Underground Neutrino Experiment). We choose three representative and specific cases from the wide set of NSI parameters, and perform fits to data generated considering one of them as the true scenario in nature. We evaluate the behavior of the significance of fits and the distortion of the CP-violating phase with respect to its true value, while we intensify the strength of the true NSI case. We look to identify patterns for each case and systematize their signature effects on observations. We have found that it is actually possible to identify said patterns in the behavior of the chosen quantities, although a direct relation between them cannot be established. This demonstrates the possibility to apply the method on other beyond Standard Model scenarios and highlights the importance of using several fit features. A part of this work was included in the poster titled DUNE sensitivity for observing/discriminating theories beyond standard neutrino oscillation, presented at the XVIII International Conference on Topics in Astroparticles and Underground Physics (TAUP 2023).

Autor(es):
PŔEZ GARCÍA, Alicia
Institución:
PUCP
Año: 2024
Ciudad: Lima
Url: https://tesis.pucp.edu.pe/repositorio/handle/20.500.12404/28800