[新聞] Higgs within reach
http://public.web.cern.ch/public/
Higgs within reach
Our understanding of the universe is about to change...
The ATLAS and CMS experiments at CERN today presented their latest results in
the search for the long-sought Higgs boson. Both experiments see strong
indications for the presence of a new particle, which could be the Higgs
boson, in the mass region around 126 gigaelectronvolts (GeV).
The experiments found hints of the new particle by analysing trillions of
proton-proton collisions from the Large Hadron Collider (LHC) in 2011 and
2012. The Standard Model of particle physics predicts that a Higgs boson
would decay into different particles – which the LHC experiments then detect.
A proton-proton collision event in the CMS experiment producing two
high-energy photons (red towers). This is what we would expect to see from
the decay of a Higgs boson but it is also consistent with background Standard
Model physics processes. c CERN 2012
Both ATLAS and CMS gave the level of significance of the result as 5 sigma on
the scale that particle physicists use to describe the certainty of a
discovery. One sigma means the results could be random fluctuations in the
data, 3 sigma counts as an observation and a 5-sigma result is a discovery.
The results presented today are preliminary, as the data from 2012 is still
under analysis. The complete analysis is expected to be published around the
end of July.
更詳盡的新聞稿
CERN experiments observe particle consistent with long-sought Higgs boson
04.07.2012
http://press.web.cern.ch/press/PressReleases/Releases2012/PR17.12E.html
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