Seminatural SUSY from the $E_7$ nonlinear sigma model.
Seminatural SUSY from the $E_7$ nonlinear sigma model.
复制标题
来自 $E_7$ 非线性 sigma 模型的半自然 SUSY。
DOI：
10.1093/ptep/ptv106
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发表时间：
2015
影响因子：
3.5
通讯作者：
Norimi Yokozaki.
中科院分区：
文献类型：
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作者：
Keisuke Harigaya;Tsutomu T. Yanagida;Norimi Yokozaki.
基于超对称非线性Sigma模型，我们提出了一种新的焦点超对称破缺场景。在这个模型中，夸克和尾波子被识别为(伪)Nambu-Goldstone玻色子。它们的质量只是通过规范和汤川相互作用辐射产生的，而且在高能尺度上它们比引力和高吉诺质量小得多。另一方面，希格斯二重态属于物质多重态，因此可能有不受抑制的超对称破缺软质量。假设希格斯双重态的Kähler势最小，我们认为它们的质量等于高能尺度下的引力子质量。结果表明，当引力子质量与伽吉诺质量之比在一定范围内时，电弱对称破缺标度的微调量显著减小到。并讨论了在大型强子对撞机和暗物质直接探测实验中发现/排除超对称粒子的前景。
We present a new focus point supersymmetry-breaking scenario based on the supersymmetricnonlinear sigma model. In this model, squarks and sleptons are identified with (pseudo) Nambu–Goldstone bosons. Their masses are generated only radiatively through gauge and Yukawa interactions, and they are much smaller than the gravitino and gaugino masses at a high energy scale. On the other hand, Higgs doublets belong to matter multiplets and hence may have unsuppressed supersymmetry-breaking soft masses. We consider their masses to be equal to the gravitino mass at the high energy scale, assuming the minimal Kähler potential for Higgs doublets. We show that the fine-tuning measure of the electroweak symmetry-breaking scale is reduced significantly to, if the ratio of the gravitino mass to the gaugino mass is around. Also, the prospects for the discovery/exclusion of supersymmetric particles at the Large Hadron Collider and dark matter direct detection experiments are discussed.