Physicists detect process even rarer than the long-sought Higgs particle

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New stringent test of the Standard Model and the mechanism by which the Higgs imparts mass to other particles Brookhaven Lab/ATLAS physicist Marc-André Pleier adjusting detector components. Scientists running the ATLAS experiment at the Large Hadron Collider (LHC), the world’s largest and most powerful “atom smasher,” report the first evidence of a process that can be used to test the mechanism by which the recently discovered Higgs particle imparts mass to other fundamental particles. More rare than the production of the Higgs itself, this process—a scattering of two same-charged particles called W bosons off one another—also provides a new stringent test of the Standard Model of particle physics. The findings, which so far are in agreement with predictions of the Standard Model, are reported in a paper just accepted by Physical Review Letters. “By measuring this process we can check whether the Higgs particle we discovered does its job the way we expect it to.” — Brookhaven Lab/ATLAS physicist Marc-André Pleier “Only about one in 100 trillion proton-proton collisions would produce one of these events,” said Marc-André Pleier, a physicist at the U.S. Department of Energy’s Brookhaven National Laboratory who played a leadership role in the analysis of this result for the ATLAS

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