Cepedello, R;
Deppisch, F;
Gonzalez, L;
Hati, C;
Hirsch, M;
(2019)
Neutrinoless Double Beta Decay with Non-standard Majoron Emission.
Physical Review Letters
, 122
(18)
, Article 181801. 10.1103/PhysRevLett.122.181801.
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Abstract
We present a novel mode of neutrinoless double- β decay with emission of a light Majoron-like scalar particle ϕ . 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- β decay rate and determine the fully differential shape for this mode. We find that future double- β decay searches are sensitive to scales of the order Λ NP ≈ 1 TeV for the effective operator and a light scalar m ϕ < 0.2 MeV , based on ordinary double- β decay Majoron searches. The angular and energy distributions can deviate considerably from that of two-neutrino double- β decay, which is the main background. We point out possible ultraviolet completions where such an effective operator can emerge.
| Type: | Article |
|---|---|
| Title: | Neutrinoless Double Beta Decay with Non-standard Majoron Emission |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.122.181801 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.122.181801 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10071721 |
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