Muon Capture Constraints on Sterile Neutrino Properties

Abstract

We show that ordinary and radiative muon capture impose stringent constraints on sterile neutrino properties. In particular, we consider a sterile neutrino with a mass between 40 to $80\mathrm{MeV}$ that has a large mixing with the muon neutrino and decays predominantly into a photon and light neutrinos due to a large transition magnetic moment. Such a model was suggested as a possible resolution to the puzzle presented by the results of the LSND, KARMEN, and MiniBooNE experiments. We find that the scenario with the radiative decay to massless neutrinos is ruled out by measurements of the radiative muon capture rates at TRIUMF in the relevant mass range by a factor of a few in the squared mixing angle. These constraints are complementary to those imposed by the process of electromagnetic upscattering and de-excitation of beam neutrinos inside the neutrino detectors induced by a large transition magnetic moment. The latter provide stringent constraints on the size of the transitional magnetic moment between muon, electron neutrinos and $N$. We also show that further extension of the model with another massive neutrino in the final state of the radiative decay may be used to bypass the constraints derived in this work.

5 pages, 5 figures, revtex4-1. v2: updated to consider anisotropic sterile neutrino decay and a way of relaxing the RMC constraints by introducing another massive sterile neutrino; improved estimate of decay probability in target

References in corpus (11)

• Evidence for Neutrino Oscillations from the Observation of Electron Anti-neutrinos in a Muon Anti-Neutrino Beam
• Event Excess in the MiniBooNE Search for ${\bar{\nu }}_{\mu }\to {\bar{\nu }}_e$ Oscillations
• Axial structure of the nucleon
• Unexplained Excess of Electron-Like Events From a 1-GeV Neutrino Beam
• Upper limits for neutrino oscillations muon-antineutrino to electron-antineutrino from muon decay at rest
• The form factors of the nucleon at small momentum transfer
• The MiniBooNE anomaly and heavy neutrino decay
• Measurement of the Rate of Muon Capture in Hydrogen Gas and Determination of the Proton's Pseudoscalar Coupling $g_P$
• Searching for dark matter sterile neutrino in laboratory
• Limits on the magnetic moment of sterile neutrino and two-photon neutrino decay
• Ordinary and radiative muon capture on the proton and the pseudoscalar form factor of the nucleon

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