An experimental proof of most low-energy signatures of string theory found?
Because the LHC has been delayed by six months, the American experiments at the Fermilab have half a year to find something interesting in their results.
See: Physics WorldAnd it is conceivable that the CDF team just found something shocking.
There has to be another particle that lives for a while - about 20 picoseconds - until it decays inches away from the beam pipe. A scrutiny shows that it cannot be any known particle. Instead, a new paper by Giromini et al. claims that there seem to be three new states with energies 15 GeV, 7.3 GeV, and 3.6 GeV. The heavier states cascade decay to the lighter ones while the lightest one decays into a tau pair after 20 ps or so: so the 15 GeV particle should decay to 8 tau's! To say that the masses of some dark sector states should be fine-tuned to be 2m_tau, 4m_tau, and 8m_tau surely looks bizarre.
More generally, however, we do see a cascade decay into many leptons that tend to fly in the same direction: "lepton jets". Let's not get carried away here: "many" has been redefined to mean "two" for the purposes of these particular events. And so far, "leptons" means "muon" because they are much easier to be detected in the "jets".
Halloween 2008 Superdark Moose diagram
Now, you can get a fresh model that seems to generate - or predict - lepton jets:
Arkani-Hamed, Weiner (PDF): LHC signals for a superunified theory of dark matterIn this picture, dark matter is composed out of particles in a hidden sector: they're charged under a hidden group, G_dark, that is broken near a GeV. This assumption may explain some recent anomalies found by ATIC and PAMELA Anderson ;-) collaborations in terms of dark matter annihilation: see a good enough interpretation of the positron excess at PAMELA released yesterday:PAMELA team hints.)