According to this blog, new standard model calculations have changed the 3 sigma B meson forward and backward production asymmetry observed at LEP into two anomolies:
- A 2.5 sigma B meson production cross section anomaly and
- A 2.5 sigma B meson forward and backward production asymmetry
And that both of these anomalies can be explained by Randall-Sundrum-type models with the right-handed b-quark localized near the IR brane (which implies extra dimensions). I have been told that these models are equivalent to saying that the b quark is composite.
Obviously, these 20 year old 2.5 sigma signals are not definitive and could have statistical or systematic error explanations, but if they hold up and are confirmed by LHC B meson measurements, I have the following questions:
- Would this constitute somewhat convincing evidence for extra dimensions?
- Would this be the first convincing evidence for extra dimensions or are there other standard model anomalies that imply extra dimensions?
- How are Randall-Sundrum-type models equivalent to saying that the b quark is composite?