Effective description of generalized disformal theories
Effective description of generalized disformal theories
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DOI：
10.1088/1475-7516/2023/07/009
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发表时间：
2023-04
影响因子：
6.4
通讯作者：
Kazufumi Takahashi;Masato Minamitsuji;H. Motohashi
中科院分区：
文献类型：
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作者：
Kazufumi Takahashi;Masato Minamitsuji;H. Motohashi
广义非形式变换使我们能够构造广义非形式Horndeski理论，它形成了迄今为止最普遍的无鬼标量张量理论。我们扩展了宇宙学微扰的有效场论（EFT），将这些广义非形式Horndeski理论。与传统的EFT的主要区别是，我们的扩展EFT涉及更高的空间导数的失效函数的运营商。我们的EFT也容纳了U-DHOST理论的广义非形式变换。
Generalized disformal transformations enable us to construct the generalized disformal Horndeski theories, which form the most general class of ghost-free scalar-tensor theories to this date. We extend the effective field theory (EFT) of cosmological perturbations to incorporate these generalized disformal Horndeski theories. The main difference from the conventional EFT is that our extended EFT involves operators with higher spatial derivatives of the lapse function. Our EFT also accommodates the generalized disformal transformation of U-DHOST theories.