Probing the inflationary particle content: extra spin-2 field

Probing the inflationary particle content: extra spin-2 field
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探测膨胀粒子含量:额外的自旋 2 场

DOI:
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发表时间:
2018
影响因子:
6.4
通讯作者:
G. Tasinato
G. Tasinato
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
E. Dimastrogiovanni;M. Fasiello;G. Tasinato

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我们研究了如何通过在暴胀过程中将最小场含量与额外的自旋2粒子耦合来影响与原始张量模式相关的暴胀观测量。我们工作的模型,是鬼免费在完全非线性的水平,并显示新的自由度如何修改标准的一致性关系的张量双谱。额外的相互作用自旋2场必然是有质量的,幺正性决定了它的质量在m H范围内。尽管这个界限为相应的张量模选择了一个衰减解,宇宙学的量子场论仍然带有这种化石场的印记。事实上,化石通常会导致可观测量的各向异性,例如张量功率谱。我们展示了这在我们的设置中是如何发挥作用的。
We study how inflationary observables associated with primordial tensor modes are affected by coupling the minimal field content with an extra spin-2 particle during inflation. We work with a model that is ghost-free at the fully non-linear level and show how the new degrees of freedom modify standard consistency relations for the tensor bispectrum. The extra interacting spin-2 field is necessarily massive and unitarity dictates its mass be in the m≳ H range. Despite the fact that this bound selects a decaying solution for the corresponding tensor mode, cosmological correlators still carry the imprints of such fossil fields. Indeed, fossil(s) can in general lead to anisotropies in observables such as the tensor power spectrum. We show how this plays out in our set-up.
DOI: 10.1088/1475-7516/2015/08/003
发表时间: 2015-05
影响因子: 6.4
作者:
Dario Cannone;Jinn-Ouk Gong;G. Tasinato
通讯作者: Dario Cannone;Jinn-Ouk Gong;G. Tasinato
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发表时间: 2016
影响因子: 6.4
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通讯作者: Bartolo N
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发表时间: 2016-12-01
影响因子: 6.4
作者:
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通讯作者: Tasinato, Gianmassimo