Calculation of a Fixed Length Fundamental SU(2) Higgs Model

  • The phase diagram of the system of SU(2) gauge field coupled with the fixed length Higgs field in the fundamental representation has been calculated analytically on the lattice by the variational-cumulant expansion method to the third order approximation. The method for determining the variational parameters has been improved by using the expression of the free energy to the second order approximation. Thus the calculated phase diagram is in good agreement with the Monte Carlo estimation and the order of the phase transition is clearly determined in the third order approximation.
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Zheng Xite and Liu Beishu. Calculation of a Fixed Length Fundamental SU(2) Higgs Model[J]. Chinese Physics C, 1990, 14(S1): 45-52.
Zheng Xite and Liu Beishu. Calculation of a Fixed Length Fundamental SU(2) Higgs Model[J]. Chinese Physics C, 1990, 14(S1): 45-52. shu
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Received: 1989-06-12
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Calculation of a Fixed Length Fundamental SU(2) Higgs Model

  • Department of Physics, Chengdu University of Science and Technology, Chengdu

Abstract: The phase diagram of the system of SU(2) gauge field coupled with the fixed length Higgs field in the fundamental representation has been calculated analytically on the lattice by the variational-cumulant expansion method to the third order approximation. The method for determining the variational parameters has been improved by using the expression of the free energy to the second order approximation. Thus the calculated phase diagram is in good agreement with the Monte Carlo estimation and the order of the phase transition is clearly determined in the third order approximation.

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