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arXiv 1705.04897gr-qchep-th
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某些矢量场调节机构中的牛顿常数和引力波

The Newton constant and gravitational waves in some vector field adjusting mechanisms

O. Santillan, M. Scornavacche

摘要:

众所周知,存在着一些洛伦兹破缺的情形,它们解释了当今时代宇宙学常数的小。分析的一个重要方面是引力波的传播和牛顿常数$G_N$在这些模型中的筛选或增强。问题是洛仑兹对称破缺项可能导致牛顿常数$G_N$的不可接受的值或在引力波中引入纵模。此外,可能会破坏标准色散关系$ω=ck$。在[21]中,作者提出了一个模型,他们认为引力常量的行为对于渐近时间是正确的。在目前的工作中,一个明确的检查,我们最终同意这些要求。此外,我们还发现引力波在大时间内也表现良好。在此过程中,获得了一些具有相同行为的新模型,从而扩大了可能的调整机制列表。

英文摘要:

As is well known, there exist some Lorentz breaking scenarios which explain the smallness of the cosmological constant in the present era. An important aspect to analyze is the propagation of gravitational waves and the screening or enhancement of the Newton constant $G_N$ in these models. The problem is that the Lorentz symmetry breaking terms may induce an unacceptable value of the Newton constant $G_N$ or introduce longitudinal modes in the gravitational waves. Furthermore there may spoil the standard dispersion relation $ω=ck$. In [21] the authors have presented a model for which they suggest that the behavior of the gravitational constant is the correct one for asymptotic times. In the present work, an explicit checking is made and we finally agree with these claims. Furthermore, it is suggested that the gravitational waves are also well behaved for large times. In the process, some new models with the same behavior are obtained, thus enlarging the list of possible adjustment mechanisms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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