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Title: Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension

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.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1545086
Report Number(s):
arXiv:1905.02727; FERMILAB-PUB-19-175-A-T
1733842
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Blinov, Nikita, Kelly, Kevin James, Krnjaic, Gordan Z, and McDermott, Samuel D. Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension. United States: N. p., 2019. Web.
Blinov, Nikita, Kelly, Kevin James, Krnjaic, Gordan Z, & McDermott, Samuel D. Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension. United States.
Blinov, Nikita, Kelly, Kevin James, Krnjaic, Gordan Z, and McDermott, Samuel D. Tue . "Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension". United States. https://www.osti.gov/servlets/purl/1545086.
@article{osti_1545086,
title = {Constraining the Self-Interacting Neutrino Interpretation of the Hubble Tension},
author = {Blinov, Nikita and Kelly, Kevin James and Krnjaic, Gordan Z and McDermott, Samuel D},
abstractNote = {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.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {5}
}