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Golden measurements at a neutrino factory
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abstract
The precision and discovery potential of a neutrino factory based on muon storage rings is studied. For three-family neutrino oscillations, we analyse how to measure or severely constraint the angle $\theta_{13}$, CP violation, MSW effects and the sign of the atmospheric mass difference $\Delta m^2_{23}$. We present a simple analytical formula for the oscillation probabilities in matter, with all neutrino mass differences non-vanishing, which clarifies the subtleties involved in disentangling the unknown parameters. The appearance of ``wrong-sign muons'' at three reference baselines is considered: 732 km, 3500 km, and 7332 km. We exploit the dependence of the signal on the neutrino energy, and include as well realistic background estimations and detection efficiencies. The optimal baseline turns out to be ${\cal O}(3000$ km). Analyses combining the information from different baselines are also presented.
Forward citations
Cited by 3 Pith papers
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When CPT Violation Hides in Plain Sight: How CP Measurements Are Compromised and How to Fix Them
CPT violation parametrized by δΔm²₃₁ induces a phase shift degenerate with δ_CP; existing atmospheric data constrains |δΔm²₃₁| ≤ 0.57×10^{-3} eV² at 90% CL.
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Interplay of CPT-Violating and CPT-Conserving Lorentz Invariance Violation at DUNE
Combined CPT-violating and CPT-conserving Lorentz-invariance-violation parameters suppress DUNE's CP-violation sensitivity below 3σ over much of the δ_CP range and introduce parameter degeneracies that complicate δ_CP...
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Enhancing the sensitivity to neutrino oscillation parameters using synergy between T2K, NO$\nu$A and JUNO
Simulated JUNO data can break the NOvA hierarchy–CP degeneracy, and whether the T2K–NOvA tension persists depends on the true mass ordering: it disappears if the ordering is inverted and survives if normal.
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