Neutrino decay as a possible interpretation to the MiniBooNE observation with unparticle scenario

Abstract

In a new measurement on neutrino oscillation ${\nu }_{\mu }\to {\nu }_e$, the MiniBooNE Collaboration observes an excess of electron-like events at low energy and the phenomenon may demand an explanation which obviously is beyond the oscillation picuture. We propose that heavier neutrino ${\nu }_2$ decaying into a lighter one ${\nu }_1$ via the transition process ${\nu }_{\mu }\to {\nu }_e+X$ where $X$ denotes any light products, could be a natural mechanism. The theoretical model we employ here is the unparticle scenario established by Georgi. We have studied two particular modes $ν_μ\to ν_e+\Un$ and ${\nu }_{\mu }\to {\nu }_e+{\bar{\nu }}_e+{\nu }_e$. Unfortunately, the number coming out from the computation is too small to explain the observation. Moreover, our results are consistent with the cosmology constraint on the neutrino lifetime and the theoretical estimation made by other groups, therefore we can conclude that even though neutrino decay seems plausible in this case, it indeed cannot be the source of the peak at lower energy observed by the MiniBooNE collaboration and there should be other mechanisms responsible for the phenomenon.

14 pages, conclusions are changed; published version for EPJC

References in corpus (1)

• Cosmological neutrino mass detection: The best probe of neutrino lifetime

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• Implications of Leptonic Unitarity Violation at Neutrino Telescopes
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• Unparticle physics at the photon collider
• Unparticle Physics and A_{FB}^b on the Z pole
• Unparticle decay of neutrinos and it's effect on ultra high energy neutrinos
• W-pair production in Unparticle Physics
• Unparticle-Enhanced Black Holes at the LHC
• Investigating Possible Neutrino Decay in Long Baseline Experiment Using ICAL as Far end Detector