Z6 symmetry, electroweak transition, and magnetic monopoles at high temperature

B.L.G. Bakker, A.I. Veselov, M.A. Zubkov
2006 Physics Letters B  
We consider the lattice realization of the Standard Model with an additional Z_6 symmetry. Numerical simulations were performed on the asymmetric lattice, which corresponds to the finite temperature theory. Our choice of parameters corresponds to large Higgs masses (M_H > 90 Gev). The phase diagram was investigated and has been found to be different from that of the usual lattice realization of the Standard Model. It has been found, that the confinement-deconfinement phase transition lines for
more » ... ansition lines for the SU(2) and SU(3) fields coincide. The transition line between Higgs and symmetric deconfinement parts of the phase diagram and the confinement-deconfinement transition line meet in a triple point. The transition between Higgs and symmetric parts of the phase diagram corresponds to the finite temperature electroweak transition/crossover. We see for the first time evidence that Nambu monopoles are condensed at T>T_c while at T<T_c their condensate vanishes.
doi:10.1016/j.physletb.2006.09.006 fatcat:yx6jne52l5csrhdsq4uqiyrcme