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arXiv 0712.4252hep-thhep-ph
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N=1超对称规范理论中亚稳态超对称的动力学破缺

Dynamical Supersymmetry Breaking from Meta-stable Vacua in an N=1 Supersymmetric Gauge Theory

Masato Arai, Claus Montonen, Nobuchika Okada, Shin Sasaki

摘要:

本文研究了N=2,SU(2)\times U(1)规范理论中的亚稳真空的超对称破缺,其中N_f=2的无质量味是通过在Fayet-Iliopoulos项存在的情况下加入小的N=1的保持质量项扰动的.我们利用N=2超对称QCD的精确结果导出了低能有效理论,并考察了有效势。在经典水平上,该理论在库仑和希格斯分支上具有超对称真空。我们发现,库仑支上的超对称性由于SU(2)规范对称性的强动力学作用而动力学破缺,而Higgs支上的超对称真空仍然存在。我们还估计了库仑分支上的局部极小值的寿命。我们发现它们足够长,因此我们发现的局部真空是亚稳态的。

英文摘要:

We investigate supersymmetry breaking meta-stable vacua in N=2, SU(2)\times U(1) gauge theory with N_f=2 massless flavors perturbed by the addition of small N=1 preserving mass terms in a presence of a Fayet-Iliopoulos term. We derive the low energy effective theory by using the exact results of N=2 supersymmetric QCD and examine the effective potential. At the classical level, the theory has supersymmetric vacua on Coulomb and Higgs branches. We find that supersymmetry on the Coulomb branch is dynamically broken as a consequence of the strong dynamics of SU(2) gauge symmetry while the supersymmetric vacuum on the Higgs branch remains. We also estimate the lifetimes of the local minima on the Coulomb branch. We find that they are sufficiently long and therefore the local vacua we find are meta-stable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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