Standard Model particle spectrum from String Theory

  • Thread starter Kalimaa23
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Dimitri Terryn said:
It seems that a group of researchers has constructed a Calabi-Yau compactification that reproduces that particles of the standard model.
A bit exagerated the claim!

1) There is no possibility for deriving the compactification from firts principles. In fact, string theory cannot predict anything.

2) Nobody has obtained the full standard model. As far i know only partial ideas like hypotetical relations of CY holes with the asumed number of families, etc. This work appears to be based in some topological 'conjetures', etc.

3) The only physical states in string theory are masless supersimmetric states. Experiments claim just the contrary. Even if in the future high-energy experiment (e.g. HLC), supersimmetry is found, that does NOT imply that string theory was correct -in fact, supersimmetry is previous to string hype and appears in several alternative theories- . Since the standard model continues to be non-superssimetric and with no massless particles -and this is independent of future experiments-, string theory continues to be wrong.

P.S.1: Any theory predicting contrary to experiment is wrong.

P.S2: The CY is not the last 'geometry' of string theory. The CY is only valid as approximation in the asymptotic regimes of the 'branescan' just when 'string theory general relativity' does not hold -string theory is background dependent, GR is NOT-. In M-theory -the full quantum gravity regime-, the manifold is still unknown, but some people is researching in G2 manifolds.
 
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