论文标题
双梁理论的物理参数空间和SN1A约束
Physical parameter space of bimetric theory and SN1a constraints
论文作者
论文摘要
双光理论描述了具有完全非线性（自我）相互作用的无质量和巨大的自旋2场。它具有丰富的现象学，并已通过几个数据集进行了成功测试。但是，观察性约束尚未在一个一致的框架中合并。我们提出了旋转$λ$和spin-2场的质量$ m_ \ mathrm {fp} $以及其与普通物质$ \barα$的耦合强度的质量$ m_ \ mathrm {fp} $。这简化了统计分析中选择先验的方法，并允许使用观察数据不仅从本地系统，而且还从宇宙学中直接限制这些参数。通过识别双光学理论的物理真空，这些参数是唯一确定的。我们为各种子模型的新参数化制定了字典，并在物理参数空间上介绍了隐含的一致性约束。然后，我们将字典应用于从SN1A的物理参数中得出观察性约束。结果，我们发现即使具有重型Spin-2场的自动加速模型也与当前的超新星数据完全吻合。
Bimetric theory describes a massless and a massive spin-2 field with fully non-linear (self-)interactions. It has a rich phenomenology and has been successfully tested with several data sets. However, the observational constraints have not been combined in a consistent framework, yet. We propose a parametrization of bimetric solutions in terms of the effective cosmological constant $Λ$ and the mass $m_\mathrm{FP}$ of the spin-2 field as well as its coupling strength to ordinary matter $\barα$. This simplifies choosing priors in statistical analysis and allows to directly constrain these parameters with observational data not only from local systems but also from cosmology. By identifying the physical vacuum of bimetric theory these parameters are uniquely determined. We work out the dictionary for the new parametrization for various submodels and present the implied consistency constraints on the physical parameter space. We then apply the dictionary to derive observational constraints from SN1a on the physical parameters. As a result we find that even self-accelerating models with a heavy spin-2 field are in perfect agreement with current supernova data.
