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.
Description
Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension
%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
}