E1 Working Group Summary: Neutrino Factories and Muon Colliders

TL;DR

This paper reviews the progress and future prospects of neutrino physics, emphasizing the development of neutrino beams, detectors, and the potential for muon colliders to explore fundamental questions in particle physics.

Contribution

It provides a comprehensive summary of the current status and future directions for neutrino factories and muon colliders, highlighting their role in advancing particle physics research.

Findings

Neutrinos have mass and oscillate, opening new physics avenues.

New neutrino beams and detectors are essential for further exploration.

Muon colliders can probe the Higgs sector and energy frontier.

Abstract

We are in the middle of a time of exciting discovery, namely that neutrinos have mass and oscillate. In order to take the next steps to understand this potential window onto what well might be the mechanism that links the quarks and leptons, we need both new neutrino beams and new detectors. The new beamlines can and should also provide new laboratories for doing charged lepton flavor physics, and the new detectors can and should also provide laboratories for doing other physics like proton decay, supernovae searches, etc. The new neutrino beams serve as milestones along the way to a muon collider, which can answer questions in yet another sector of particle physics, namely the Higgs sector or ultimately the energy frontier. In this report we discuss the current status of neutrino oscillation physics, what other oscillation measurements are needed to fully explore the phenomenon, and finally, what other new physics can be explored as a result of building of these facilities.