Classification and dynamics of equivalence classes in SU(N) gauge theory on the orbifold S1/Z2
Classification and dynamics of equivalence classes in SU(N) gauge theory on the orbifold S1/Z2
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DOI：
10.1143/ptp.111.265
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发表时间：
2004-02-01
影响因子：
--
通讯作者：
Kawamura, Y
中科院分区：
文献类型：
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作者：
Haba, N;Hosotani, Y;Kawamura, Y
本文研究了S-1/Z（2）轨道上SU（N）规范理论中边界条件的动力学确定。我们对边界条件的等价类进行了分类，然后在每一个等价类中计算了理论的真空能量密度。在超对称理论中，两种理论在不同等价类中的真空能量密度的无条件比较成为可能。发现在Scherk-Schwarz超对称破缺的超对称SU（5）模型中，虽然低能理论不一定是最小超对称标准模型，但具有标准模型对称性的边界条件的理论是能量密度最低的等价类。我们还研究了在宇宙演化中如何选择特定的边界条件。
The dynamical determination of the boundary conditions in SU(N) gauge theory on the orbifold S-1/Z(2) is investigated. We classify the equivalence classes of the boundary conditions, and then the vacuum energy density of the theory in each equivalence class is evaluated at one loop order. Unambiguous comparison of the vacuum energy densities in the two theories in different equivalence classes becomes possible in supersymmetric theories. It is found that in the supersymmetric SU(5) models with the Scherk-Schwarz supersymmetry breaking, the theory with the boundary conditions yielding the standard model symmetry is in the equivalence class with the lowest energy density, though the low energy theory is not identically the minimal supersymmetric standard model. We also study how particular boundary conditions are chosen in the cosmological evolution of the universe.