A subatomic particle discovered last year that may be the long-sought
Higgs boson might doom our universe to an unfortunate end, researchers
say.
The mass of the particle, which was uncovered at the world's largest
particle accelerator — the Large Hadron Collider (LHC) in Geneva — is a
key ingredient in a calculation that portends the future of space and
time.
"This calculation tells you that many tens of billions of years from
now there'll be a catastrophe," Joseph Lykken, a theoretical physicist
at the Fermi National Accelerator Laboratory in Batavia, Ill., said
Monday, Feb. 18, at the annual meeting of the American Association for
the Advancement of Science.
"It may be the universe we live in is inherently unstable, and at
some point billions of years from now it's all going to get wiped out,"
added Lykken, a collaborator on one of the LHC's experiments.
The Higgs boson particle is a manifestation of an energy field
pervading the universe called the Higgs field, which is thought to
explain why particles have mass. After searching for decades for proof
that this field and particle existed, physicists at the LHC announced in
July 2012 that they'd discovered a new particle whose properties
strongly suggest it is the Higgs boson.
To confirm the particle's identity for sure, more data are needed. But many scientists say they're betting it's the Higgs.
"This discovery to me was personally astounding," said I. Joseph
Kroll, a University of Pennsylvania physicist who also works at the LHC.
"To me, the Higgs was sort of, it might be there, it might not. The
fact that it's there is really a tremendous accomplishment.
And finding the Higgs, if it's truly been found, not only confirms
the theory about how particles get mass, but it allows scientists to
make new calculations that weren't possible before
the particle's properties were known.
For example, the mass of the new particle is about 126 billion
electron volts, or about 126 times the mass of the proton. If that
particle really is the Higgs, its mass turns out to be just about what's
needed to make the universe fundamentally unstable, in a way that would
cause it to end catastrophically in the far future.
That's because the Higgs field is thought to be everywhere, so it affects the vacuum of empty space-time in the universe.
"The mass of the Higgs is related to how stable the vacuum is,"
explained Christopher Hill, a theoretical physicist at the Fermi
National Accelerator Laboratory. "It's right along the critical line.
That could either be a cosmic coincidence, or it could be that there's
some physics that's causing that. That's something new, which we didn't
know before."