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Title: Constraints and consequences of reducing small scale structure via large dark matter-neutrino interactions

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1];  [1];  [1]
  1. Univ. of Washington, Seattle, WA (United States). Dept. of Physics

Here, cold dark matter explains a wide range of data on cosmological scales. However, there has been a steady accumulation of evidence for discrepancies between simulations and observations at scales smaller than galaxy clusters. One promising way to affect structure formation on small scales is a relatively strong coupling of dark matter to neutrinos. We construct an experimentally viable, simple, renormalizable model with new interactions between neutrinos and dark matter and provide the first discussion of how these new dark matter-neutrino interactions affect neutrino phenomenology. We show that addressing the small scale structure problems requires asymmetric dark matter with a mass that is tens of MeV. Generating a sufficiently large dark matter-neutrino coupling requires a new heavy neutrino with a mass around 100 MeV. The heavy neutrino is mostly sterile but has a substantial τ neutrino component, while the three nearly massless neutrinos are partly sterile. This model can be tested by future astrophysical, particle physics, and neutrino oscillation data. Promising signatures of this model include alterations to the neutrino energy spectrum and flavor content observed from a future nearby supernova, anomalous matter effects in neutrino oscillations, and a component of the τ neutrino with mass around 100 MeV.

Research Organization:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0011637
OSTI ID:
1455176
Journal Information:
Journal of High Energy Physics (Online), Vol. 2015, Issue 4; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (16)

Highly-boosted dark matter and cutoff for cosmic-ray neutrinos through neutrino portal journal January 2019
Long-lived light mediator to dark matter and primordial small scale spectrum journal May 2015
Solar neutrinos as a probe of dark matter-neutrino interactions journal July 2017
Refined bounds on MeV-scale thermal dark sectors from BBN and the CMB journal January 2020
Probing light dark matter with a hadrophilic scalar mediator journal November 2019
Mononeutrino at DUNE: New signals from neutrinophilic thermal dark matter journal March 2019
The Sterile–Active Neutrino Flavor Model: The Imprint of Dark Matter on the Electron Neutrino Spectra journal December 2018
Global Constraints on a Heavy Neutrino text January 2015
Indirect Detection of Neutrino Portal Dark Matter text January 2017
Thermal Dark Matter Through the Dirac Neutrino Portal text January 2017
Dark matter-neutrino interactions through the lens of their cosmological implications text January 2017
Monochromatic dark neutrinos and boosted dark matter in noble liquid direct detection text January 2018
The Sterile-Active Neutrino Flavor Model: the Imprint of Dark Matter on the Electron Neutrino Spectra text January 2018
Mono-Neutrino at DUNE: New Signals From Neutrinophilic Thermal Dark Matter text January 2019
Breaking Mirror Twin Hypercharge text January 2019
Refined Bounds on MeV-scale Thermal Dark Sectors from BBN and the CMB text January 2019

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