Upper limit on the rest mass of neutrinos if. .

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SUMMARY

The discussion focuses on how cosmology can establish an upper limit on the rest mass of neutrinos, given that the universe contains approximately 450 neutrinos per cubic centimeter. The energy density fraction of neutrinos is constrained by large-scale structure formation models. These models, alongside the thermal history and properties of the relic neutrino background, provide a definitive upper limit on neutrino mass. A referenced thread offers additional insights into the physical mechanisms involved.

PREREQUISITES
  • Understanding of cosmology and large-scale structure formation
  • Familiarity with the concept of relic neutrino background
  • Knowledge of energy density fractions in cosmological models
  • Basic principles of particle physics related to neutrinos
NEXT STEPS
  • Research the implications of relic neutrino background on cosmological models
  • Study large-scale structure formation in the universe
  • Explore the methods used to measure neutrino mass limits
  • Investigate the thermal history of the universe and its effects on particle physics
USEFUL FOR

Astronomers, cosmologists, physicists, and researchers interested in the properties of neutrinos and their role in the universe's structure.

UMich1344
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How can cosmology set an upper limit on the rest mass of neutrinos if we know that the universe contains about 450 neutrinos per cubic centimeter?
 
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The fraction of the energy density of neutrinos in the universe is constrained by models of large scale structure formation. According to the assumed thermal history and properties of the relic neutrino background, this, in turn, puts a upper limit on their mass. You can find some information about the involved physical mechanism and a very pedagogical reference about neutrinos and structure formation in this thread:
https://www.physicsforums.com/showthread.php?t=185198
 
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