Particles, Astrophysics, and Nuclear Physics Seminar

Novel Objects in the Electroweak Theory

Vishesh Khemani
Center for Theoretical Physics

The bosonic sector of the electroweak theory has several classical solutions, such as the sphaleron and the instanton, which have rich phenomenology associated with them. We describe a topological prescription that finds all well-known solutions and suggests the existence of novel ones. All spatially-varying, static solutions are unstable. But it may be possible to stabilize a configuration by having it carry a conserved quantum number. We explain the mechanism and motivation for the existence of such a quantum soliton and describe the search for one. In this context we discuss the quantum sphaleron, new saddle points, and electroweak strings. Finally, we consider the possibility of unnaturally long-lived, spatially localized and temporally periodic configurations (approximate breathers) in the theory.

Monday, January 26, 2004
2:00 PM
Gant Science Complex
Physics Department
Room P121

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