Finding eV-scale light relics with cosmological observables

  title={Finding eV-scale light relics with cosmological observables},
  author={Nicholas DePorzio and Weishuang Linda Xu and Julian B. Mu{\~n}oz and Cora Dvorkin},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
Cosmological data provide a powerful tool in the search for physics beyond the Standard Model (SM). An interesting target are light relics, new degrees of freedom which decoupled from the SM while relativistic. Nearly massless relics contribute to the radiation energy budget, and are commonly searched through variations in the effective number $N_{\rm eff}$ of neutrino species. Additionally, relics with masses on the eV scale (meV-10 eV) become non-relativistic before today, and thus behave as… 
Nonthermal hot dark matter from inflaton or moduli decay: Momentum distribution and relaxation of the cosmological mass bound
Decay of the inflaton or moduli which dominated the energy density of the universe at early times leads to a matter to radiation transition epoch. We consider non-thermal sterile dark matter
Dark Matter Physics from the CMB-S4 Experiment
The nature of dark matter is one of the major puzzles of fundamental physics, integral to the understanding of our universe across almost every epoch. The search for dark matter takes place at
Dark radiation constraints on portal interactions with hidden sectors
We update dark radiation constraints on millicharged particle (MCP) and gauged baryon-number-minus-lepton-number (B − L) extensions of the Standard Model (SM). In these models, a massive SM gauge
Snowmass2021 Cosmic Frontier White Paper: Probing dark matter with small-scale astrophysical observations
The current understanding of dark matter comes largely from measurements of the total matter content in the universe, from the distribution of gravitating matter on very large scales, and from
The Physics of Light Relics
Many well-motivated extensions of the Standard Model predict the existence of new light species that may have been produced in the early universe. Prominent examples include axions, sterile
Cosmological implications of axion-matter couplings
Axions and other light particles appear ubiquitously in physics beyond the Standard Model, with a variety of possible couplings to ordinary matter. Cosmology offers a unique probe of these particles
Cosmological constraints on light but massive relics
Many scenarios of physics beyond the standard model predict new light, weakly coupled degrees of freedom, populated in the early universe and remaining as cosmic relics today. Due to their high
Cosmological Implications of a Neutrino Mass Detection
The next generation of cosmological surveys are expected to measure a non-zero sum of neutrino masses, even down to the minimum value of 58 meV inferred from neutrino flavor oscillation. The
Unraveling the Dirac neutrino with cosmological and terrestrial detectors


arXiv:1908.01062 [astro-ph.IM
  • Am. Astron. Soc. 51,
  • 2019
and C
  • Dvorkin,
  • 2020
DESI), (2016), arXiv:1611.00036 [astro-ph.IM
  • 2016
JCAP 1107
  • 034
  • 2011
  • P. Alam
  • Composites Engineering: An A–Z Guide
  • 2021
  • P. Alam
  • Composites Engineering: An A–Z Guide
  • 2021
and a at
tobacco and products and use of tanning beds. Friends the biggest on predisposition to harmful habits.
A Supersymmetry Primer
I provide a pedagogical introduction to supersymmetry. The level of discussion is aimed at readers who are familiar with the Standard Model and quantum field theory, but who have had little or no