Brans-Dicke理论超对称扩展的宇宙学意义
Cosmological implications of a supersymmetric extension of the Brans-Dicke theory
摘要：
在Brans-Dicke理论中，普朗克质量被一个动力学的标量场所代替。我们在这里考虑这种机制的超对称类似物，在超引力拉格朗日中用手征超场代替普朗克质量。这种分析的动机是研究超对称暗物质场景和基于Brans-Dicke理论的暗能量模型之间可能的联系。我们发现，与原来的Brans-Dicke理论相反，在其超对称类比中，引力扇区并不以普适度规的方式与物质扇区耦合。因此，在这种情况下可能会出现违反弱等效原则的情况。
英文摘要：
In the Brans-Dicke theory the Planck mass is replaced by a dynamical scalar field. We consider here the supersymmetric analogous of this mechanism replacing in the supergravity Lagrangian the Planck mass with a chiral superfield. This analysis is motivated by the research of possible connections between supersymmetric Dark Matter scenarios and Dark Energy models based on Brans-Dicke-like theories. We find that, contrary to the original Brans-Dicke theory, in its supersymmetric analogous the gravitational sector does not couple to the matter sector in a universal metric way. As a result, violations of the weak equivalence principle could be present in such a scenario.
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