Probing the inflationary particle content: extra spin-2 field
Probing the inflationary particle content: extra spin-2 field
复制标题
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
中科院分区:
文献类型:
--
作者:
E. Dimastrogiovanni;M. Fasiello;G. Tasinato
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.
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
影响因子:
6.4
作者:
Bartolo N
通讯作者:
Bartolo N
DOI:
10.1088/1475-7516/2016/12/026
发表时间:
2016-12-01
影响因子:
6.4
作者:
Bartolo, Nicola;Caprini, Chiara;Tasinato, Gianmassimo
通讯作者:
Tasinato, Gianmassimo