In one of the last updates before the Large Hadron Collider (LHC) shuts down until 2015, CERN has announced that its observation of the Higgs boson (or a particle that is Higgs-like) is now approaching 7 sigma certainty.
5 sigma 99.9999% certainty, or more correctly a 0.00001% chance that you have made a faulty observation is the threshold for an observation to be labeled a scientific discovery. CERN crossed the 5 sigma threshold this summer. At 7 sigma, both the CMS and ATLAS teams are reporting that theres only a 0.0000000001% chance that they havent found a Higgs-like particle.
Over the last few months you may have noticed the use of the phrase Higgs-like, rather than Higgs boson. This is because CERN and the scientific community cant be certain that theyve actually found the Higgs boson all they know is that theyve found a particle, with a mass of around 125 GeV, that behaves as predicted by the Standard Model of particle physics. With its discovery now completely and utterly confirmed, further analysis (due in 2013) will now focus on the particles spin, and other properties. Eventually, perhaps after upgrades are completed and the LHC turns back on in 2015, the particle will be officially announced as the Higgs boson (or not, which would be much more interesting).
This is what the output from CERN's ATLAS experiment looks like
In other news, CERN says that it has observed the decay of the Bs meson (strange B meson) into two muons. Apparently this is one of the rarest processes ever observed in particle physics, which means its a good chance that it could lead to new science.
CERN now 99.999999999% sure it has found the Higgs boson | ExtremeTech