An Optimised Perturbation Expansion For a Global O(2) Theory
classification
✦ hep-ph
hep-lat
keywords
expansionmethodoptimisedperturbationcalledcontinuouscouplingsdelta-expansion
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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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