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  • Open Access

Muon Colliders and the Neutrino Slice

Luc Bojorquez-Lopez1,*, Matheus Hostert1,†, Carlos A. Argüelles1,‡, and Zhen Liu2,§

  • 1Department of Physics & Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, Massachusetts 02138, USA
  • 2School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA

  • *Contact author: luc_bojorquezlopez@college.harvard.edu
  • †Contact author: mhostert@g.harvard.edu
  • ‡Contact author: carguelles@g.harvard.edu
  • §Contact author: zliuphys@umn.edu
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Phys. Rev. Lett. 135, 091803 – Published 26 August, 2025

DOI: https://doi.org/10.1103/4sj1-ycft

Abstract

Muon colliders provide an exciting new direction to expand the energy frontier of particle physics. We point out a new use of these facilities for neutrino and beyond the standard model physics using their main detectors. Muon decays along the accelerator rings create an intense and highly collimated neutrino beam that crosses a thin slice of the kt-scale detector. As a result, it would induce an unprecedented number of neutrino interactions, with O(104) events per second for a 10 TeV μ+μ− collider. These interactions are highly energetic and possess a distinct timing signature and a large transverse displacement. We discuss promising applications of these events for instrumentation, electroweak, and beyond-the-standard model physics. For instance, a subpercent measurement of the neutrino-electron scattering rate enables new precision measurements of the Weak angle and a novel detection of the neutrino charge radius.

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Outline

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Phys. Rev. Lett. 135, 091803– Published 26 August, 2025
  • Received 16 March 2025
  • Revised 10 July 2025
  • Accepted 23 July 2025
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