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Searching for Majorana Neutrinos at a Same-Sign Muon Collider
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Majorana properties of neutrinos have long been a focus in the pursuit of possible new physics beyond the standard model, which has motivated lots of dedicated theoretical and experimental studies. A future same-sign muon collider is an ideal platform to search for Majorana neutrinos through the Lepton Number Violation process. Specifically, this t-channel kind of process is less kinematically suppressed and has a good advantage in probing Majorana neutrinos at high mass regions up to 10 TeV. In this paper, we perform a detailed fast Monte Carlo simulation study through examining three different final states: 1) pure-leptonic state with electrons or muons, 2) semi-leptonic state, and 3) pure-hadronic state in the resolved or merged categories. Furthermore, we perform a full simulation study on the pure-leptonic final state to validate our fast simulation results.
Forward citations
Cited by 5 Pith papers
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Neutrino t-channels at Colliders: When Light Neutrinos Matter
The same-sign WW→ℓℓ t-channel signal for heavy Majorana neutrinos is cancelled by light-neutrino contributions in the seesaw model; the opposite-sign eµjj channel is a better probe.
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Multiboson Signatures of Doubly Charged Scalars at a Same-Sign Muon Collider
A same-sign muon collider at 2 TeV with 1 ab^-1 could reach 2-sigma sensitivity to Type-II seesaw doubly charged scalars decaying to WW up to roughly 425-430 GeV, slightly extending current LHC coverage.
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Search for heavy Majorana neutrinos at muon-proton colliders via lepton-number-violating signals
Simulates LNV signals from heavy Majorana neutrinos (200-3000 GeV) at a 5.3 TeV μp collider and projects 2σ limits on |V_ℓN|² superior to LHC bounds for 100 fb⁻¹ and 1 ab⁻¹ luminosities.
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Probing maximal flavor changing $Z'$ in $U(1)_{L_\mu-L_\tau}$ at $\mu$TRISTAN
MuTRISTAN's mu+mu+ mode could discover a mu-tau flavor-changing Z' with gauge coupling near 0.024 for masses around 500 GeV.
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Vector Boson Fusion Signatures of Superheavy Majorana Neutrinos at Muon Colliders
Future muon colliders could probe heavy Majorana neutrino masses via t-channel vector boson fusion, with projected exclusions in the (mass, mixing) plane from cut-based and BDT analyses.
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