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Ulrich Heintz Brown University

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spontaneous symmetry breaking<br />

• 1965<br />

Higgs Guralnik Hagen Kibble Brout Englert<br />

• introduce a field with a special potential<br />

• continuously degenerate ground state at non-zero field<br />

• field equations have same symmetry as theory<br />

• every ground state breaks the symmetry<br />

• can describe massive particles by coupling<br />

them with the Higgs field<br />

• the quantum of this field is the Higgs boson<br />

Higgs mechanism<br />

3/24/2011 <strong>Ulrich</strong> <strong>Heintz</strong> - Moriond QCD 4

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