The tricritical point of finite-temperature phase transitions in large N(Higgs) gauge theories

Abstract

Gauge theories broken by a single Higgs field are known to have first-order phase transitions in temperature if $\lambda /g^2\ll 1$, where $g$ is the gauge coupling and $\lambda$ the Higgs self-coupling. If the theory is extended from one to $N$ Higgs doublets, with U($N$) flavor symmetry, the transition is known to be second order for $\lambda /g^2\gtrsim 1$ in the $N\to \infty$ limit. We show that one can in principal compute the tricritical value of $\lambda /g^2$, separating first from second-order transitions, to any order in $1/N$. In particular, scalar fluctuations at the transition damp away the usual problems with the infrared behavior of high-temperature non-Abelian gauge theories. We explicitly compute the tricritical value of $\lambda /g^2$ for U(1) and SU(2) gauge theory to next-to-leading order in $1/N$.

33 pages, LaTex with RevTex, 15 figures in embeded postscript (epsf)

References in corpus (6)

• Is There a Hot Electroweak Phase Transition at $m_H\gsim m_W$?
• Effective Field Theory Approach to High-Temperature Thermodynamics
• 3D Physics and the Electroweak Phase Transition: Perturbation Theory
• Critical exponents of a three dimensional O(4) spin model
• The $\epsilon$-expansion and the electroweak phase transition
• On the Possibility of Second-Order Phase Transitions in Spontaneously Broken Gauge Theories

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