Seminarium "Teoria cząstek elementarnych i kosmologia"

The mass of the Higgs field can be set to zero dynamically in extra dimensions, where a ``radion'' field self-tunes the Higgs mass exactly to zero classically. Quantum fluctuations in the size of the extra dimension give rise to a non-vanishing but suppressed vacuum expectation value for the Higgs, breaking symmetries like those of the Standard Model spontaneously. An explicit 5D model for this type of Higgs sector is discussed.