![]() The observed properties of the Higgs boson put the standard model vacuum intriguingly close to the border between stable and metastable. A recent highlight is the direct observation of the Higgs boson coupling to muons. The discovery of the Higgs boson was a major milestone in particle physics, confirming the standard model.ĭirect tests of the couplings of the Higgs boson to fermions confirmed the mechanism that gives mass to the W and Z bosons, thus making the electroweak interaction short range. Here we review the current understanding of the Higgs boson and discuss the insights expected from present and future experiments. A detailed study of the Higgs boson is at the centre of the European Strategy for Particle Physics update. The Higgs potential also influences ideas about the cosmological constant, the dark energy that drives the accelerating expansion of the Universe, the mysterious dark matter that comprises about 80% of the matter component in the Universe and a possible phase transition in the early Universe that might be responsible for baryogenesis. The Higgs boson mass of 125 GeV is a remarkable value, meaning that the underlying state of the Universe, the vacuum, sits very close to the border between stable and metastable, which may hint at deeper physics beyond the standard model. ![]() So far, experiments at the LHC have focused on testing the Higgs boson’s couplings to other elementary particles, precision measurements of the Higgs boson’s properties and an initial investigation of the Higgs boson’s self-interaction and shape of the Higgs potential. ![]() ![]() The Higgs boson, a fundamental scalar boson with mass 125 GeV, was discovered at the Large Hadron Collider (LHC) at CERN in 2012. ![]()
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