Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor

Understand

Neutrinos are one of the most promising messengers for signals of new physics Beyond the Standard Model (BSM).

• On the theoretical side, their elusive nature, combined with their unknown mass mechanism, seems to indicate that the neutrino sector is indeed opening a window to new physics.
• On the experimental side, several long-standing anomalies have been reported in the past decades, providing a strong motivation to thoroughly test the standard three-neutrino oscillation paradigm.
• In this Snowmass21 white paper, we explore the potential of current and future neutrino experiments to explore BSM effects on neutrino flavor during the next decade.