Gravitational Interactions and Neutrino Masses
arXiv:2003.04908 · doi:10.1103/PhysRevD.101.115024
Abstract
We describe a scenario where the smallness of neutrino masses is related to a global symmetry that is only violated by quantum gravitational effects. The coupling of neutrinos to gauge singlet right-handed fermions is attributed to symmetry preserving gravitational operators suppressed by the Planck mass, in this framework. The proposed scenario leads to axion particles that decay into neutrinos, which could be probed through cosmological measurements and may help explain the Hubble parameter tension. Depending on the details of the implementation, the scenario could provide axion dark matter candidates.
7 pages, 3 figures. This version, accepted for publication in Physical Review D, includes clarifying comments regarding Eq.(14), which has been made more accurate; typo in Eq.(23) corrected. Numerical results and figures have been updated to reflect changes
References in corpus (9)
- Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
- Ultralight scalars as cosmological dark matter
- Discovering the QCD Axion with Black Holes and Gravitational Waves
- Neutrino Majorana Masses from String Theory Instanton Effects
- Late universe decaying dark matter can relieve the H_0 tension
- Comprehensive geoneutrino analysis with Borexino
- Study of solar and other unknown anti-neutrino fluxes with Borexino at LNGS
- Approximate Symmetries and Gravity
- Hidden Sector and Gravity