Deppisch, FF;
Graf, L;
Harz, J;
Huang, W-C;
(2018)
Neutrinoless double beta decay and the baryon asymmetry of the Universe.
Physical Review D
, 98
(5)
, Article 055029. 10.1103/PhysRevD.98.055029.
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Abstract
We discuss the impact of the observation of neutrinoless double beta decay on the washout of lepton number in the early universe. Neutrinoless double beta decay can be triggered by a large number of mechanisms that can be encoded in terms of standard model effective operators which violate lepton number by two units. We calculate the contribution of such operators to the rate of neutrinoless double beta decay and correlate it with the washout of lepton number induced by the same operators in the early universe. We find that the observation of a nonstandard contribution to neutrinoless double beta decay, i.e., not induced by the standard mass mechanism of light neutrino exchange, would correspond to an efficient washout of lepton number above the electroweak scale for many operators up to mass dimension 11. Combined with standard model sphaleron transitions, this would render many baryogenesis mechanisms at higher scales ineffective.
| Type: | Article |
|---|---|
| Title: | Neutrinoless double beta decay and the baryon asymmetry of the Universe |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.98.055029 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.98.055029 |
| Language: | English |
| Additional information: | Copyright © the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. 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.ucl.ac.uk/id/eprint/10057467 |
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