The Utility of Quantum Field Theory

Details The Utility of Quantum Field Theory The Utility of Quantum Field Theory

2000-10-04

arxiv.org/abs/hep-ph/0010035v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pp, latex, Plenary talk at ICHEP 2000,typos and refs. fixed

Scientific paper

This talk surveys a broad range of applications of quantum field theory, as well as some recent developments. The stress is on the notion of effective field theories. Topics include implications of neutrino mass and a possible small value of $\sin(2\beta)$, supersymmetric extensions of the standard model, the use of field theory to understand fundamental issues in string theory (the problem of multiple ground states and the question: does string theory predict low energy supersymmetry), and the use of string theory to solve problems in field theory. Also considered are a new type of field theory, and indications from black hole physics and the cosmological constant problem that effective field theories may not completely describe theories of gravity.

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