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We investigate the monopole-antimonopole pair solution in the SU(2) x U(1)Weinberg-Salam theory with $\phi$-winding number, $n=3$ for bifurcationphenomena. The magnetic monopole merges with antimonopole to form a vortex ringwith finite diameter at $n=3$. Other than the fundamental solution, two newbifurcating solution branches were found when Higgs coupling constant$\lambda$, reaches a critical value $\lambda_c$. The two new branches possesshigher energies than the fundamental solutions. These bifurcating solutionsbehave differently from the vortex ring configuration in SU(2) Yang-Mills-Higgstheory since thery are full vortex-ring. We investigate on the total energy$E$, vortex ring diameter $d_{\rho}$, and magnetic dipole moment $\mu_m$, for$0 \leq \lambda \leq 49$.

Monopole-Antimonopole Pair With Higher Energy Branch In SU(2) x U(1) Weinberg-Salam Theory