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arXiv · hep-ph/9308224

Loop-Induced Majoronic Decay of Neutrinos:

Darwin Chang·Jiang Liu·Palash B. Pal
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Abstract

In models where the suppression of the tree level couplings of fermions with Goldstone bosons is not protected by symmetry, the loop-induced couplings can in general dominate over the tree couplings. We demonstrate this by calculating the decay $ν\to ν' + \mbox{Majoron}$ in the simplest singlet Majoron model. It is shown that 1-loop contributions can be orders of magnitude bigger than the tree-level result, and hence allows a wide range of interesting values of neutrino mass and mixing to be compatible with cosmological constraints.

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Darwin Chang, Jiang Liu, Palash B. Pal. 1993-08-04. Loop-Induced Majoronic Decay of Neutrinos:. https://arxiv.org/abs/hep-ph/9308224

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