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RESEARCH PRODUCT
The self-couplings of vector bosons: does LEP-1 obviate LEP-2?
M.b. GavelaA. De RújulaE. MassóPorfidio Hernándezsubject
PhysicsNuclear and High Energy PhysicsParticle physicsPhysics beyond the Standard ModelScalar (mathematics)FísicaElementary particleWeinberg angleMinimal modelTheoretical physicsGauge theoryQuantum field theoryParticle Physics - TheoryGauge symmetrydescription
Abstract Theories beyond the standard model (“meta-theories”) are severely constrained by the current body of data and must necessarily respect the standard gauge symmetry. We analyze the constraints on two generic types of meta-theory, in which fundamental scalar do or do not exist. The novel low-energy effects can be comprehensively described by grafting onto the standard lagrangian new operators that - in the sense of a Taylor expansion - form a complete set. Completeness calls for consideration of previously discarded operators, and for a thorough exploitation of the equations of motion. We illustrate the current strictures by focusing on the allowed range of departures from the most crucial, untested, precise standard prediction: the size and structure of the triple gauge-boson vertices. We conclude that their direct measurement at LEP-2, while phenomenologically very interesting, is, alas, unlikely to provide new information.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-10-01 |