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arXiv 1812.04644hep-ph
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真空稳定性约束对超对称模型唯象的影响

Impact of Vacuum Stability Constraints on the Phenomenology of Supersymmetric Models

Wolfgang G. Hollik, Georg Weiglein, Jonas Wittbrodt

摘要:

提出了一种快速有效的方法来研究标准模型之外的多标量理论中的真空稳定性约束。该方法被设计用于大尺度参数扫描的可靠使用。标量势的最小化是用著名的多项式同伦延拓完成的,多标量理论中假真空的衰减率是由单场情况下反弹作用的精确解估计的。我们比较更精确的计算的隧道路径在树和一个循环的水平,并找到很好的协议所产生的约束参数空间。数值稳定性,运行时间和可靠性显着改善相比,现有的文献中的方法。这个过程被应用到几个现象学上有趣的基准场景中定义的最小超对称标准模型。我们利用我们有效的方法来研究同时变化的多个字段的影响,并说明正确识别最危险的最小值中的最小值比电弱真空更深的重要性。

英文摘要:

We present a fast and efficient method for studying vacuum stability constraints in multi-scalar theories beyond the Standard Model. This method is designed for a reliable use in large scale parameter scans. The minimization of the scalar potential is done with the well-known polynomial homotopy continuation, and the decay rate of a false vacuum in a multi-scalar theory is estimated by an exact solution of the bounce action in the one-field case. We compare to more precise calculations of the tunnelling path at the tree- and one-loop level and find good agreement for the resulting constraints on the parameter space. Numerical stability, runtime and reliability are significantly improved compared to approaches existing in the literature. This procedure is applied to several phenomenologically interesting benchmark scenarios defined in the Minimal Supersymmetric Standard Model. We utilize our efficient approach to study the impact of simultaneously varying multiple fields and illustrate the importance of correctly identifying the most dangerous minimum among the minima that are deeper than the electroweak vacuum.

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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