Deppisch, F;
Graf, L;
Rodejohann, W;
Xu, X-J;
(2020)
Neutrino self-interactions and double beta decay.
Physical Review D
, 102
(5)
, Article 051701(R). 10.1103/PhysRevD.102.051701.
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Abstract
Neutrino self-interactions ( ν SI ) beyond the Standard Model are an attractive possibility to soften cosmological constraints on neutrino properties and also to explain the tension in late and early time measurements of the Hubble expansion rate. The required strength of ν SI to explain the 4 σ Hubble tension is in terms of a pointlike effective four-fermion coupling that can be as high as 10 9 G F , where G F is the Fermi constant. In this work, we show that such strong ν SI can cause significant effects in two-neutrino double beta decay, leading to an observable enhancement of decay rates and to spectrum distortions. We analyze self-interactions via an effective operator as well as when mediated by a light scalar. Data from observed two-neutrino double beta decay are used to constrain ν SI , which rules out the regime around 10 9 G F .
| Type: | Article |
|---|---|
| Title: | Neutrino self-interactions and double beta decay |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.102.051701 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.102.051701 |
| 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/ |
| 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/10109427 |
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