Where the electroweak phase transition ends

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  • 23 April 1997
Abstract
We give a more precise characterisation of the end of the electroweak phase transition in the framework of the effective 3d SU(2)-Higgs lattice model than has been given before. The model has now been simulated at beta_G=12 and 16 for M_H^*=70 GeV and Higgs masses above the critical mass up to lattices 80^3 and the data have been used for reweighting. The breakdown of finite volume scaling of the Lee-Yang zeroes indicates the immediate change from a first order transition to a crossover at lambda_3/g_3^2=0.105(1) in rough agreement with results of Karsch et al. at beta_G=9 and smaller lattices. The infinite volume extrapolation of the discontinuity Delta /g_3^2 turns to zero at lambda_3/g_3^2=0.113(2). We comment on the limitations of the second method.

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