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arXiv 2202.01154hep-th
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软高阶导数大质量引力

Softly higher-derivative massive gravity

C. A. S. Almeida, W. T. Cruz, R. V. Maluf, A. Yu. Petrov, P. J. Porfirio

摘要:

在这篇工作中,我们研究了$D$维时空中的高导数质量引力,其中质量项是由于嵌入在$4D$ Minkowski时空中的2-膜引起的。我们考虑了高导数质量引力的DGP膜世界模型的共振质量项的影响。此外,我们加入了引力Chern-Simons和Ricci-Cotton项到这个模型中,并使用Barnes-Rivers自旋投影仪来计算引力子传播子。利用得到的传播子,我们讨论了模型的一致性,写出了色散关系,并分析了因果性和么正性。

英文摘要:

In this work, we study the higher-derivative massive gravity in $D$-dimensional space-time with the mass term arisen due to a 2-brane embedded in a $4D$ Minkowski spacetime. We consider the effect of a resonance mass term from the DGP braneworld model for the higher-derivative massive gravity. Moreover, we add the gravitational Chern-Simons and Ricci-Cotton terms to this model and evaluate the graviton propagator using a basis of Barnes-Rivers spin projectors. Using the obtained propagator, we proceed with discussing the consistency of the model, writing the dispersion relations, and analyzing causality and unitarity.

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