All Questions
5
questions
3
votes
1
answer
85
views
Will the universe be full of neutrinos?
If neutrinos are so easy to produce, but it rarely get absorbed or detected, doesn't that mean the universe will be full of neutrinos?
Will its density ever reach a balance where its absorption events ...
- 471
0
votes
0
answers
31
views
Why can't Dark matter be made up mostly of Neutrinos? [duplicate]
It's said that Neutirnos can only make up a tiny fraciton of dark matter.
So why can't Dark matter be mostly made up of Neutrinos?
Why can't there just be a huge number of them?
I suspect myself that ...
- 2,908
3
votes
1
answer
75
views
How did neutrinos eliminated from dark matter? [duplicate]
I am reading "Dark Matter and Dark Energy" by Brian Clegg.
In Chapter 3 it's discussing about cosmic microwave background radiation and the elliptical shape
of early universe obtained from ...
2
votes
2
answers
110
views
Will a neutrino gas always stay at the same temperature?
Does the neutrino gas pervading the universe always have the same temperature? Does it still have the temperature as the neutrino gas that emerged from the big bang? Neutrinos don't interact, so how ...
4
votes
0
answers
182
views
How to understand particle decoupling in the early universe?
We often say that when the rate of some interactions, say the beta decay and electron capture, are slower that the rate of universe's expansion, then the corresponding particles, say neutrinos, ...
- 3,691