Physique Théorique et Mathématique and International Solvay Institutes, Université Libre de Bruxelles, Belgium.
Phys Rev Lett. 2011 Aug 5;107(6):061601. doi: 10.1103/PhysRevLett.107.061601. Epub 2011 Aug 2.
We consider two SUSY-breaking hidden sectors which decouple when their respective couplings to the visible particles are switched off. In such a scenario one expects to find two light fermions: the Goldstino and the pseudo-Goldstino. While the former remains massless in the rigid limit, the latter becomes massive due to radiative effects which we analyze from several different points of view. This analysis is greatly facilitated by a version of the Goldberger-Treiman relation, which allows us to write a universal nonperturbative formula for the mass. We carry out the analysis in detail in the context of gauge mediation, where we find that the pseudo-Goldstino mass is at least around the GeV scale and can be easily at the electroweak range, even in low scale models. This leads to interesting and unconventional possibilities in collider physics and it also has potential applications in cosmology.
我们考虑了两个 SUSY 破缺的隐藏领域，当它们各自与可见粒子的耦合被关闭时，它们就会分离。在这种情况下，人们预计会发现两种轻费米子：Goldstino 和 pseudo-Goldstino。虽然前者在刚性极限下仍然是无质量的，但后者由于辐射效应而变得有质量，我们从几个不同的角度来分析这种效应。这种分析由于 Goldberger-Treiman 关系的一个版本而变得更加容易，该版本允许我们为质量写出一个通用的非微扰公式。我们在规范介导的背景下详细地进行了分析，在那里我们发现 pseudo-Goldstino 质量至少在 GeV 范围内，并且可以很容易地在电弱范围内，即使在低标度模型中也是如此。这在对撞机物理中带来了有趣和非常规的可能性，并且它在宇宙学中也有潜在的应用。
