paper

Vacuum Stability Conditions From Copositivity Criteria

arXiv:1205.3781 · doi:10.1140/epjc/s10052-012-2093-z

Abstract

A scalar potential of the form is bounded from below if its matrix of quartic couplings is copositive -- positive on non-negative vectors. Scalar potentials of this form occur naturally for scalar dark matter stabilised by a symmetry. Copositivity criteria allow to derive analytic necessary and sufficient vacuum stability conditions for the matrix . We review the basic properties of copositive matrices and analytic criteria for copositivity. To illustrate these, we re-derive the vacuum stability conditions for the inert doublet model in a simple way, and derive the vacuum stability conditions for the complex singlet dark matter, and for the model with both a complex singlet and an inert doublet invariant under a global U(1) symmetry.

15 pages, 1 figure, complex singlet in polar form clarified

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