Physicists on Higgs hunt: Nearly there but not yet

WASHINGTON (AP) - Physicists in Italy said on Wednesday they are achingly close to concluding that what they found last year was the Higgs boson, the elusive "God particle". They need to eliminate one last remote possibility that it's something else.

The long theorised subatomic particle would explain why matter has mass and has been called a missing cornerstone of physics.

With new analyses, scientists are 99.6 per cent certain they found the crucial Higgs boson. But they want to be 99.9 per cent positive, said Ms Pauline Gagnon, a physicist with the European Center for Nuclear Research.

Last July scientists with the world's largest atom smasher, the US$10 billion (S$12 billion) Large Hadron Collider on the Swiss-French border, announced finding a particle they described as Higgs-like, but wouldn't say it was conclusively the particle. Now thousands of checks show them even closer.