Science Focus
original post »Fresh evidence that a new particle discovered in 2012 is the Higgs boson has been unveiled today by an international collaboration led by researchers at MIT. The findings, published in the journal Nature Physics, confirm that the bosons decay to fermions — a group of particles that includes all leptons and quarks — as predicted by the Standard Model of particle physics. “This is an enormous breakthrough,” says Markus Klute, an assistant professor of physics at MIT and leader of the international effort. “Now we know that particles like electrons get their mass by coupling to the Higgs field, which is really exciting.” In July 2012 researchers from the ATLAS and Compact Muon Solenoid (CMS) experiments at CERN, the European Organization for Nuclear Research, revealed that they had observed a new particle in the mass region of 125 to 126 gigaelectronvolts (GeV). Preliminary studies revealed that the new particle’s properties were consistent with those predicted for the Higgs boson by the Standard Model, but much more work was needed to confirm this. In particular, researchers wanted to clarify whether there was a single Higgs or many different Higgs particles, as predicted by various extensions of the Standard Model, Klute says. “What
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