Tricritical Point in Quantum Phase Transitions of the Coleman-Weinberg Model at Higgs Mass
نویسندگان
چکیده
The tricritical point, which separates first and second order phase transitions in three-dimensional superconductors, is studied in the four-dimensional Coleman-Weinberg model, and the similarities as well as the differences with respect to the threedimensional result are exhibited. The position of the tricritical point in the Coleman-Weinberg is derived and found to be in agreement with the Thomas-Fermi approximation in the three-dimensional Ginzburg-Landau theory. From this we deduce a special role of the tricritical point for the Standard Model Higgs sector in the scope of the latest experimental results, which suggests the unexpected relevance of tricritical behavior in the electroweak interactions.
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