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arXiv 1910.12876hep-phastro-ph.COhep-th
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在宇宙对撞机上寻找大信号

In Search of Large Signals at the Cosmological Collider

Lian-Tao Wang, Zhong-Zhi Xianyu

摘要:

我们在原始双谱中寻找新物理重粒子的振荡信号,这些重粒子明显大,可用于下一代大尺度结构(LSS)调查。我们表明,在普通的通货膨胀的情况下,一个缓慢的滚动暴胀产生密度波动,并没有打破标度不变性或时空对称性,有没有自然的大信号,除非滚动暴胀产生宇称奇重粒子的化学势。我们通过观察估计该信号的可访问性。虽然目前的CMB数据在最乐观的情况下已经很敏感,但未来的探测,包括LSS调查和21厘米观测,可以覆盖模型空间的有趣区域。

英文摘要:

We look for oscillating signals in the primordial bispectrum from new physics heavy particles which are visibly large for next generation large scale structures (LSS) survey. We show that in ordinary inflation scenarios where a slow-rolling inflaton generates density fluctuations and with no breaking of scale invariance or spacetime symmetry, there exist no naturally large signals unless the rolling inflaton generates a parity-odd chemical potential for the heavy particles. We estimate the accessibility of this signal through observations. While current CMB data are already sensitive in the most optimistic scenario, future probes, including LSS survey and 21 cm observation, can cover interesting regions of the model space.

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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