@Article{Cepedello_etal2019,
author="Cepedello, R.
and Deppisch, F. F.
and Gonzalez, L.
and Hati, C.
and Hirsch, M.",
title="Neutrinoless Double-Beta Decay with Nonstandard Majoron Emission",
journal="Physical Review Letters",
year="2019",
publisher="Amer Physical Soc",
volume="122",
number="18",
pages="181801--6pp",
abstract="We present a novel mode of neutrinoless double-beta decay with emission of a light Majoron-like scalar particle phi. We assume it couples via an effective seven-dimensional operator with a (V + A) lepton current and (V +/- A) quark currents leading to a long-range contribution that is unsuppressed by the light neutrino mass. We calculate the total double-beta decay rate and determine the fully differential shape for this mode. We find that future double-beta decay searches are sensitive to scales of the order Lambda(NP) approximate to 1 TeV for the effective operator and a light scalar m(phi) < 0.2 MeV, based on ordinary double-beta decay Majoron searches. The angular and energy distributions can deviate considerably from that of two-neutrino double-beta decay, which is the main background. We point out possible ultraviolet completions where such an effective operator can emerge.",
optnote="WOS:000467042800001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4002), last updated on Mon, 12 Aug 2019 16:25:58 +0000",
issn="0031-9007",
doi="10.1103/PhysRevLett.122.181801",
opturl="https://arxiv.org/abs/1811.00031",
opturl="https://doi.org/10.1103/PhysRevLett.122.181801",
language="English"
}