Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1997-07-25
Nucl.Phys. B515 (1998) 345-360
Physics
High Energy Physics
High Energy Physics - Lattice
23 pages, 7 figures included, Latex, epsfig. Minor changes in Sec.3 and in the conclusions. In press on Nuc.Phys.B
Scientific paper
10.1016/S0550-3213(97)00820-1
We carry a Monte Carlo study of the coupled two-scalar $\lambda\phi^2_1 \phi^2_2$ model in three dimensions. We find no trace of Inverse Symmetry Breaking in the region of negative $\lambda$'s for which the one-loop effective potential predicts this phenomenon. Moreover, for $\lambda$'s negative enough, but still in the stability region for the potential, one of the transitions turns out to be of first order, both for zero and finite temperature.
Bimonte Giuseppe
Iniguez David
Tarancon Alfonso
Ullod C. L.
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