Resonant flavor conversion of supernova neutrinos and neutrino parameters

TL;DR

This paper investigates how unknown supernova matter density profiles affect neutrino flavor conversion signals, proposing a parametrization to distinguish MSW effects from other uncertainties using multi-detector analysis.

Contribution

It introduces a new parametrization for unknown local density profiles and analyzes MSW effects in supernova neutrinos through a model-independent, multi-detector approach.

Findings

Proposes a specific parametrization for uncertain SN density profiles.

Analyzes MSW flavor conversion effects with existing spectral models.

Discusses limitations of the current analysis.

Abstract

The unknown neutrino parameters may leave detectable signatures in the supernova (SN) neutrino flux. However, even the contribution from the MSW flavor transition alone could cause ambiguity in the interpretation to the neutrino signals because of the uncertain local density profile of the SN matter and the model-dependent SN neutrino spectral parameters. A specific parametrization to the unknown local density profile is proposed in this work, and the contribution from the standard MSW effect is investigated through a multi-detector analysis of the SN neutrinos. In establishing the model-independent scheme, results based on the existing spectral models are included. The limitation of the analysis is also discussed.