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arXiv 1207.0670gr-qcastro-ph.HEhep-th
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Horava-Lifshitz引力的尺度层次:蟹状星云中同步辐射的强约束

Scale hierarchy in Horava-Lifshitz gravity: a strong constraint from synchrotron radiation in the Crab nebula

Stefano Liberati, Luca Maccione, Thomas P. Sotiriou

摘要:

Horava-Lifshitz引力模型包含由特征尺度抑制的高阶算子,该特征尺度要求在参数上小于普朗克尺度。我们表明,重新计算的同步辐射约束蟹状星云足以排除这种规模是相同的数量级的洛伦兹打破规模的物质部门的可能性。这突出了需要一种机制,抑制渗透的洛伦兹破坏的物质部门,是有效的高阶运营商以及。

英文摘要:

Horava-Lifshitz gravity models contain higher order operators suppressed by a characteristic scale, which is required to be parametrically smaller than the Planck scale. We show that recomputed synchrotron radiation constraints from the Crab nebula suffice to exclude the possibility that this scale is of the same order of magnitude as the Lorentz breaking scale in the matter sector. This highlights the need for a mechanism that suppresses the percolation of Lorentz violation in the matter sector and is effective for higher order operators as well.

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