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Scalar fields and extension of the Standard Model

The Higgs field is the only scalar (spin-0) field to be detected; all the other fundamental fields in the Standard Model are spin- 1 / 2 fermions or spin-1 bosons. According to Rolf-Dieter Heuer, director general of CERN when the Higgs boson was discovered, this existence proof of a scalar field is almost as important as the Higgs's role in determining the mass of other particles. It suggests that other hypothetical scalar fields suggested by other theories, from the inflaton to quintessence, could perhaps exist as well.