An Optimised Perturbation Expansion For a Global O(2) Theory

Details An Optimised Perturbation Expansion For a Global O(2) Theory An Optimised Perturbation Expansion For a Global O(2) Theory

1999-11-25

arxiv.org/abs/hep-ph/9911492v1

Nucl.Phys. B577 (2000) 325-340

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX2e, 15 pages, 12 eps figures

Scientific paper

10.1016/S0550-3213(00)00120-6

We use an optimised perturbation expansion called the linear delta-expansion
to study the phase transition in a Higgs sector with a continuous symmetry and
large couplings. Our results show how to use this non-perturbative method
successfully for such problems. We also show how to simplify the method without
losing any flexibility.

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