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arXiv 1409.3074gr-qcastro-ph.COhep-th
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广义置信度规下de Rham-Gabadadze-Tolley大质量引力的协变Stückelberg分析

Covariant Stückelberg analysis of de Rham-Gabadadze-Tolley massive gravity with a general fiducial metric

Xian Gao, Tsutomu Kobayashi, Masahide Yamaguchi, Daisuke Yoshida

摘要:

研究了在一般置信度规下非线性质量引力的Stückelberg分析。我们开发了一个“协变”的形式主义的Stückelberg膨胀的工作与当地的惯性框架,通过该螺旋度模式可以正确的特点。在这种协变方法中,可以一致地执行扩展的$Λ_3$解耦极限分析,这使$\bar{R}_{μνρσ}/m^2$与基准度量的黎曼张量$\bar{R}_{μνρσ}$保持固定。在这个扩展的解耦限制,标量模式$π$收购自相互作用由于存在的曲率的基准度量。然而,$π$的运动方程仍然是二阶导数,这扩展了对在平坦基准度量的情况下不存在Boulware Deser鬼的理解。

英文摘要:

The Stückelberg analysis of nonlinear massive gravity in the presence of a general fiducial metric is investigated. We develop a "covariant" formalism for the Stückelberg expansion by working with a local inertial frame, through which helicity modes can be characterized correctly. Within this covariant approach, an extended $Λ_3$ decoupling limit analysis can be consistently performed, which keeps $\bar{R}_{μνρσ}/m^2$ fixed with $\bar{R}_{μνρσ}$ the Riemann tensor of the fiducial metric. In this extended decoupling limit, the scalar mode $π$ acquires self-interactions due to the presence of the curvature of the fiducial metric. However, the equation of motion for $π$ remains of second order in derivatives, which extends the understanding of the absence of the Boulware Deser ghost in the case of a flat fiducial metric.

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