Long-lived Sterile Neutrino Searches at Future Muon Colliders
Qi Bi, Jinhui Guo, Jia Liu, Yan Luo, Xiao-Ping Wang

TL;DR
This paper investigates the potential of future high-energy muon colliders to detect long-lived sterile neutrinos, introducing a model with a new gauge symmetry that enhances production and allows for displaced vertex searches.
Contribution
The study proposes a Dirac sterile neutrino model with ${ m U(1)}_{L_mu-L_ au}$ symmetry and analyzes the collider's sensitivity to sterile neutrino masses and mixing angles.
Findings
Muon colliders can probe sterile neutrino masses up to 5 TeV.
Displaced vertex method effectively detects long-lived neutrinos.
Enhanced production via ${ m U(1)}_{L_mu-L_ au}$ symmetry improves search prospects.
Abstract
We explore the potential of studying sterile neutrinos at a future high-energy muon collider, where these particles can generate small active neutrino masses via the seesaw mechanism and exhibit long-lived particle signatures. A Dirac sterile neutrino model with symmetry is introduced, where the heavy right-handed neutrino () produces tiny active neutrino masses, and the light left-handed neutrino () naturally behaves as a long-lived particle. The gauge symmetry also enhances sterile neutrino pair production at a future high-energy muon collider. Using the displaced vertex method, the muon collider can search for heavy sterile neutrino, especially for . We find that a muon collider with TeV and luminosity ab can probe masses of GeV and…
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Taxonomy
TopicsNeutrino Physics Research · Astrophysics and Cosmic Phenomena · Particle physics theoretical and experimental studies
