CERN spots Higgs boson decay breaking the rules
According to said Standard Model and CERN, around 0.15 percent of Higgs bosons should decay into a Z boson and photon, but the data indicates it's actually happening in around 6.6 percent of decays picked up by the Large Hadron Collider. In theoretical models that extend the Standard Model to include other particles the Higgs' Z boson/photon decay rate varies from the 0.15 percent predicted by the standard Standard Model.
"Through a meticulous combination of the individual results of ATLAS and CMS, we have made a step forward towards unraveling yet another riddle of the Higgs boson," said ATLAS physics coordinator Pamela Ferrari. Of course, there's also the certainty of this discovery to assess, and it's not as sure a thing as theitself by CERN scientists in 2012. While the Higgs boson's evidence was given a statistical significance of 5-Sigma , the Z boson/photon decay discovery only rates 3.4-Sigma – still a pretty low chance of being a mistaken observation, but greater than the discovery of the Higgs boson itself.
In other words, the science continues with hopes more Higgs observations will help clear things up."This study is a powerful test of the Standard Model. With the ongoing third run of the LHC and the future High-Luminosity LHC, we will be able to improve the precision of this test and probe ever rarer Higgs decays," said CMS physics coordinator Florencia Canelli. ®
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