Tensor bispectrum mediated by an excited scalar field during inflation

Autor:	Peng, Zhi-Zhang, Fang, Cheng-Jun, Guo, Zong-Kuan
Rok vydání:	2024
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory
Zdroj:	Phys. Rev. D 110, 043538(2024)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.110.043538
Popis:	We calculate the tensor bispectrum mediated by an excited scalar field during inflation and find that the bispectrum peaks in the squeezed configuration, which is different from that of gravitational waves induced by enhanced curvature perturbations re-entering the horizon in the radiation-dominated era. Measuring the bispectrum provides a promising way to distinguish the stochastic gravitational-wave background generated during inflation from that generated after inflation. Comment: 10 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2403.04617 Zobrazit plný text záznamu View this record from Arxiv