Flavour changing neutrinos and relevance to big bang

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SUMMARY

The discussion centers on the implications of flavour changing neutrinos and their relevance to the early universe, particularly concerning CP violation. The concept of CP violation is crucial as it explains the asymmetry between matter and antimatter, which is essential for understanding why matter exists today. Observations since 1964 have confirmed CP violation, but the effects observed have been minimal. Current research, including results from the NOvA experiment, suggests a potential for larger CP violation in neutrinos, although measurement uncertainties remain significant.

PREREQUISITES
  • Understanding of CP violation in particle physics
  • Familiarity with neutrino interactions and detection methods
  • Knowledge of the significance of matter-antimatter asymmetry
  • Basic concepts of the Big Bang theory
NEXT STEPS
  • Research the NOvA experiment and its findings on neutrino CP violation
  • Explore the implications of CP violation on the evolution of the universe
  • Study the methods used for detecting neutrinos and their interactions
  • Investigate the historical context and developments in CP violation since 1964
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Particle physicists, cosmologists, and anyone interested in the fundamental questions of matter and antimatter in the universe.

1oldman2
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The following article is interesting to me, however particle physics is not one of my strong points, could anyone comment on it and its implications regarding the early universe? Thanks.
http://www.bbc.com/news/science-environment-36776167
 
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Oh, they finally bothered to add slides to the conference website.

I think the BBC introduction does quite a good job. We expect that initially there was the same amount of matter and antimatter around. If they come together they annihilate. If matter and antimatter would be completely symmetric, nothing is left. But there is matter left - there has to be an asymmetry (called "CP violation" - details don't matter here), and we can calculate its strength based on the amount of matter that was left.
CP violation has been observed, first in 1964. The problem: the observed violation was tiny. We found it in a few more related places since 1964, but always too small.

The hope is now that neutrinos show larger CP violation. Unfortunately, neutrinos rarely interact with matter, so all those measurements are complicated, need large detectors and a lot of time. The result of NOvA has a weak hint of non-zero CP violation for neutrinos, but the measurment uncertainty is still very large.

@Orodruin is a neutrino expert.
 
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