%0 Generic %1 blinov2019constraining %A Blinov, Nikita %A Kelly, Kevin J. %A Krnjaic, Gordan %A McDermott, Samuel D. %D 2019 %K tifr %T Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension %U http://arxiv.org/abs/1905.02727 %X Large, non-standard neutrino self-interactions have been shown to resolve the $4\sigma$ tension in Hubble constant measurements and a milder tension in the amplitude of matter fluctuations. We demonstrate that interactions of the necessary size imply the existence of a force-carrier with a large neutrino coupling ($> 10^-4$) and mass in the keV -- 100 MeV range. This mediator is subject to stringent cosmological and laboratory bounds, and we find that nearly all realizations of such a particle are excluded by existing data unless it carries spin 0 and couples almost exclusively to $\tau$-flavored neutrinos. Furthermore, we find that the light neutrinos must be Majorana, and that a UV-complete model requires a non-minimal mechanism to simultaneously generate neutrino masses and appreciable self-interactions.

@misc{blinov2019constraining, abstract = {Large, non-standard neutrino self-interactions have been shown to resolve the $\sim 4\sigma$ tension in Hubble constant measurements and a milder tension in the amplitude of matter fluctuations. We demonstrate that interactions of the necessary size imply the existence of a force-carrier with a large neutrino coupling ($> 10^{-4}$) and mass in the keV -- 100 MeV range. This mediator is subject to stringent cosmological and laboratory bounds, and we find that nearly all realizations of such a particle are excluded by existing data unless it carries spin 0 and couples almost exclusively to $\tau$-flavored neutrinos. Furthermore, we find that the light neutrinos must be Majorana, and that a UV-complete model requires a non-minimal mechanism to simultaneously generate neutrino masses and appreciable self-interactions.}, added-at = {2019-05-09T06:35:50.000+0200}, author = {Blinov, Nikita and Kelly, Kevin J. and Krnjaic, Gordan and McDermott, Samuel D.}, biburl = {https://www.bibsonomy.org/bibtex/28011aaf1e9c6b91d41948394b301b22e/citekhatri}, description = {Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension}, interhash = {e2da02d4c88ab62997e495e8458bcd81}, intrahash = {8011aaf1e9c6b91d41948394b301b22e}, keywords = {tifr}, note = {cite arxiv:1905.02727Comment: 10 pages, 2 figures, 3 appendices}, timestamp = {2019-05-09T06:35:50.000+0200}, title = {Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension}, url = {http://arxiv.org/abs/1905.02727}, year = 2019 }