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arXiv 1006.0637hep-thhep-ph
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微扰N = 2理论中的亚稳真空

On metastable vacua in perturbed N=2 theories

Roberto Auzzi, Eliezer Rabinovici

摘要:

本文研究了N = 2规范理论的库仑支上亚稳真空中的超对称破缺,其中规范群为SU(2),不同的物质含量(N_f = 0,2,4)。这个理论被变形为一个超势,它是u = Tr Φ ^2中的一个三次多项式,其中Φ是伴随超场。在这个N = 1理论中的扰动参数的允许区域被绘制为模空间坐标的函数。在渐近自由的情况下,一个显着的微调的扰动参数需要实现亚稳真空的弱耦合区域的模空间;一个较低程度的微调是需要在强耦合制度。在共形情况下(N_f = 4基本项),我们发现为了产生亚稳真空,也必须引入超多重态的显式质量。在N_f = 2的情况下,也有可能在Argyres-Douglas不动点附近获得亚稳真空(即使在此极限下需要很大程度的微调)。直接规范调解进行了讨论,可以得到的超对称性破缺相同的顺序的高根质量。

英文摘要:

We study supersymmetry breaking in metastable vacua on the Coulomb branch of perturbed N=2 gauge theories, with gauge group SU(2) and different matter content (N_f=0,2,4). The theory is deformed with a superpotential which is a cubic polynomial in u=Tr Φ^2, where Φis the adjoint superfield. The allowed region of the perturbation parameters in this N=1 theory is plotted as a function of the moduli space coordinate. In the asymptotically free cases a significant fine-tuning in the perturbation parameters is needed to achieve metastable vacua in the weakly coupled region of the moduli space; a lower degree of fine-tuning is required in the strongly coupled regime. In the conformal case (N_f=4 fundamentals) we find that also an explicit mass for the hypermultiplets must be introduced in order to generate metastable vacua. In the case of N_f=2 fundamentals it is possible to achieve a metastable vacuum also in the neighborhood of the Argyres-Douglas fixed point (even if a large degree of fine-tuning is needed in this limit). Direct gauge mediation is discussed; gaugino masses of the same order of the SUSY-breaking can be obtained.

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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