Both of the experiments hunting for the Higgs boson, purported to be the source of mass in the Universe, claim much higher certainty that the particle exists. The particle has been the subject of a decades-long hunt as the last missing piece of physics' Standard Model, explaining why matter has mass.
Now one Higgs-hunting team at the Large Hadron Collider report a "5.9 sigma" levels of certainty it exists. That equates to a one-in-300 million chance that the Higgs does not exist and the results are statistical flukes. The findings only shore up a result that, as far as physicists were concerned, had already passed muster for declaring the existence of a new particle.
However, many questions remain as to whether the particle is indeed the long-sought Higgs boson; the announcement was carefully phrased to describe a "Higgs-like" particle. More analyses will be needed to ensure it fits neatly into the Standard Model - the most complete theory we have for particles and forces - as it currently exists.
Via Dr. Stefan Gruenwald