Friday, December 21, 2012

Another Milestone for the SM!

The standard model (SM) of particle physics has crossed another milestone as reported by LHCb collaboration at the recent hadron collider physics symposium held in Kyoto. They have done an incredible measurement of B meson decaying into muon anti-muon pairs. However, people started using this SM milestone as a bullet in SUSY's chest. BBC reported LHCb UK spokesperson saying, "SUSY might not be dead yet, but these results have certainly put her into hospital". And this statement was enough to spark off a debate in the blogosphere followed by couple of arXiv pre-prints. Well, its true that no sign of new physics in this measurement is disappointing, but it amazes me that SUSY has suffered the most whereas there are plenty of other beyond standard model frameworks in the market. I could see three different types of reactions : SUSY is dead or in hospital, SUSY is less natural than thought and SUSY is still alive or in good health. The first reaction is of course a bit harsh and extreme but probably was good for many others who have come up with pre-prints showing available parameter space (natural parameter space probably, I am confused though what to call natural nowadays) which exactly fit these observations. Even if we collect as much data as we want, they will probably never justify the first reaction and at the worst case will leave us with a situation which is a linear combination of the second two reactions.

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