Numerical evidence that the O(2)⊕O(3) multicritical point in a 3D SU(2) lattice gauge-Higgs model realizes an O(5)-symmetric critical point, with a first Monte Carlo value of the crossover exponent y2,2=1.838(10).
Hasenbusch, Three-dimensional O(N)-invariant ϕ4 models at criticality forN≥ 4, Phys
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O(5) multicriticality in the 3D two flavor SU(2) lattice gauge Higgs model
Numerical evidence that the O(2)⊕O(3) multicritical point in a 3D SU(2) lattice gauge-Higgs model realizes an O(5)-symmetric critical point, with a first Monte Carlo value of the crossover exponent y2,2=1.838(10).