New Physics Opportunities at Neutrino Facilities: BSM Physics at Accelerator, Atmospheric, and Reactor Neutrino Experiments

TL;DR

This paper reviews the potential of current and future neutrino experiments to explore physics beyond the Standard Model, emphasizing accelerator-based experiments and recent experimental results.

Contribution

It provides a comprehensive overview of new physics opportunities at neutrino facilities, including experimental plans, sensitivities, and recent results, with a focus on accelerator-based experiments in East Asia.

Findings

Neutrino experiments can probe diverse new physics scenarios beyond oscillations.

Next-generation facilities have promising sensitivities for detecting BSM signals.

Recent experimental results offer insights into physics beyond the Standard Model.

Abstract

Since the discovery of the Higgs boson, the long-standing task at hand in particle physics is the search for new physics beyond the Standard Model, which accounts for only about 5\% of the Universe. In light of this situation, the neutrino sector has drawn significant attention due to neutrino oscillations, which require physics beyond the Standard Model and have prompted a wide array of active and planned experimental programs. Notably, neutrino facilities offer substantial potential to search for new physics beyond neutrino oscillations, owing to their precision measurement capabilities, diverse experimental configurations, and various neutrino sources. This paper provides a review of the landscape of new physics that can be probed at current and future neutrino experiments, categorized into laboratory-produced and cosmogenic signals. We discuss recent experimental results interpreted through the lens of new physics, as well as detailed plans and projected sensitivities of next-generation facilities. This review is based on presentations from the 4th Workshop on New Physics Opportunities in Neutrino Facilities (NPN 2024), held at IBS in Daejeon, Korea, on June 3-5, 2024. Particular emphasis is placed on accelerator-based neutrino experiments and a range of neutrino programs in East Asia. We also outline key tasks necessary to realize the promising new physics opportunities ahead.