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arXiv 1808.07883hep-thgr-qchep-ph
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4-导数引力的新红外增强

New infra-red enhancements in 4-derivative gravity

Alberto Salvio, Alessandro Strumia, Hardi Veermae

摘要:

4-导数引力提供了一个可重整的量子引力理论,但代价是引入了一个物理鬼,它可以允许一个合理的正能量量子化。为了理解它的物理学,我们在树级计算物质粒子之间的鬼介导的散射,发现一个新的功率样的红外增强典型的4-导数理论,我们称之为“$ghostrahlung$”。超普朗克散射通过辐射硬引力子和鬼而降级为普朗克散射,它们是弱耦合的并带走能量。

英文摘要:

4-derivative gravity provides a renormalizable theory of quantum gravity at the price of introducing a physical ghost, which could admit a sensible positive-energy quantization. To understand its physics, we compute ghost-mediated scatterings among matter particles at tree-level, finding a new power-like infra-red enhancement typical of 4-derivative theories, that we dub '$ghostrahlung$'. Super-Planckian scatterings get downgraded to Planckian by radiating hard gravitons and ghosts, which are weakly coupled and carry away the energy.

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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