"It's a boson:" Higgs quest bears new particle

By Chris Wickham and Robert Evans

GENEVA (Reuters) - Scientists at Europe's CERN research center have found a new subatomic particle, a basic building block of the universe, which appears to be the boson imagined and named half a century ago by theoretical physicist Peter Higgs.

"We have reached a milestone in our understanding of nature," CERN director general Rolf Heuer told a gathering of scientists and the world's media near Geneva on Wednesday.

"The discovery of a particle consistent with the Higgs boson opens the way to more detailed studies, requiring larger statistics, which will pin down the new particle's properties, and is likely to shed light on other mysteries of our universe."

Two independent studies of data produced by smashing proton particles together at CERN's Large Hadron Collider produced a convergent near-certainty on the existence of the new particle.

It is unclear that it is exactly the boson Higgs foresaw, which by bestowing mass on other matter helps explain the way the universe was ordered after the chaos of Big Bang.

But addressing scientists assembled in the CERN auditorium, Heuer posed them a question: "As a layman, I would say I think we have it. Would you agree?" A roar of applause said they did.

For some, there was no doubt the Higgs boson is found: "It's the Higgs," said Jim Al-Khalili of Surrey University, a British physicist and popular broadcaster. "The announcement from CERN is even more definitive and clear-cut than most of us expected.

"Nobel prizes all round."