- #1
kalish
- 28
- 0
Hello, in the paper from sean carroll "the cosmological constant" we can read this:
Does this variation of the cosmological constant after symetry breaking is considered as real and accepted in standard cosmology? I find very few talks about a varying cosmological constant, and it is about border line theories. Is it set at the value actually observed in the whole evolution of the universe?
Best.
In the Weinberg-Salam electroweak model, the phases of broken
and unbroken symmetry are distinguished by a potential energy difference of approximately
MEW ∼ 200 GeV (where 1 GeV = 1.6 × 10−3 erg); the universe is in the broken-symmetry
phase during our current low-temperature epoch, and is believed to have been in the symmet-
ric phase at sufficiently high temperatures in the early universe. The effective cosmological
constant is therefore different in the two epochs; absent some form of prearrangement, we
would naturally expect a contribution to the vacuum energy today of order
Does this variation of the cosmological constant after symetry breaking is considered as real and accepted in standard cosmology? I find very few talks about a varying cosmological constant, and it is about border line theories. Is it set at the value actually observed in the whole evolution of the universe?
Best.