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Did scientists find the 'God Particle'? Higgs Boson announcement expected.

European scientists say they are close to discovering the so-called God particle, which, if it exists, would help explain why matter has mass.

By Clara MoskowitzLiveScience / June 22, 2012

This track is an example of simulated data modelled for the ATLAS detector on the Large Hadron Collider (LHC) at CERN. The Higgs boson is produced in the collision of two protons at 14 TeV and quickly decays into four muons, a type of heavy electron that is not absorbed by the detector. The tracks of the muons are shown in yellow.

CERN/ATLAS

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Anticipation is rising over the expected announcement soon of more evidence for the existence of the long-sought Higgs boson particle.

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The Higgs has been theorized for years, but never found. Humanity's best hope of discovering the particle lies in the humongous atom smasher buried underneath Switzerland and France called the Large Hadron Collider (LHC). There, physicists collide protons head-on to create explosions that give rise to new, exotic particles, including, maybe, the Higgs.

LHC researchers plan to share their latest findings at the International Conference on High Energy Physics (ICHEP) in Melbourne, Australia, from July 4-11.

In December of last year, LHC scientists at the machine's home facility, the CERN physics laboratory in Geneva, reported they'd seen hints of what could be the Higgs boson in an excess of particles weighing about 124 or 125 gigaelectronvolts, or GeV, a unit roughly equivalent to the mass of a proton. However, the physicists hadn't accumulated enough data to announce a discovery, which in science requires a certain level of statistical significance called "five sigma."

Experts say it's still unlikely the LHC researchers have reached the five-sigma level yet, but they have collected substantially more data since their last public announcement. [Top 5 Implications of Finding the Higgs Boson]

"They will have quite a bit more data now, but the analysis is still ongoing," said CERN press officer Renilde Vanden Broeck. "So we will have to wait and see."

The findings reported so far have been called "tantalizing hints" of the Higgs' existence by LHC physicists, but it remains possible that the signal researchers see is merely a statistical fluke.

"This is science," Vanden Broeck told LiveScience. "They are not going to announce a discovery until they are absolutely sure, when it's a real five-sigma."

And if the signal does come through more strongly in the new data, it will still take some investigation to determine if it represents the Higgs boson or something else even more exotic.

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