2026/08/03 by Ju-Yeol Choi, Matheus Hostert, Peiran Li +1 · 1 citation
Physics and Astronomy · #hep-ph #hep-ex
27 pages, 22 figures
arxiv created 2026/08/03 · arxiv updated 2026/08/05
Muon decays in a muon collider ring would produce TeV neutrino and antineutrino beams of electron and muon flavor. We study this flux in the forward μ+ and μ- beam directions at a 10 TeV muon collider, introducing MINT, a dedicated Monte Carlo simulation to model neutrino fluxes including the muon beam dynamics. We find that a benchmark detector at 5 km from the interaction point would see about O(109) neutrino interactions per year in a ∼3 tonne fiducial volume with a beam spot size of O(1) meter. We calculate the number of secondary muons and neutrinos generated by neutrino interactions in the rock upstream of the forward detectors and find that about two secondary high-energy and highly polarized muons from the rock would cross each detector per bunch crossing. Neutrino productions of charmed mesons and taus in the rock generate a small ντ+ντ secondary flux, with O(0.2) events per year in the detectors, likely too small to be observed. Wrong-sign neutrinos from similar processes, such as νe+νμ in the μ- beam, are more numerous but still of O(10-9) of the number of TeV neutrino interactions. Finally, we outline how the large forward neutrino exposure can be used to search for beyond-the-Standard-Model particles produced in neutrino interactions, with examples of heavy neutral leptons coupled to electron and muon flavors through mixing or electromagnetic dipole operators.