Renormalization group improvement of the effective potential in six dimensions
Abstract
Using the renormalization group improvement technique, we study the effective potential of a model consisting of N scalar fields φi transforming in the fundamental representation of O(N) group coupled to an additional scalar field σ via cubic interactions, defined in a six-dimensional spacetime. We find that the model presents a metastable vacuum, that can be long-lived, where the particles become massive. The existence of attractive and repulsive interactions plays a crucial role in such phenomena.
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