26 citations · 32 across the 9 of their papers we have counts for
9 papers
Constraints on primordial black holes from : scalar induced gravitational waves as an extra radiation component
Jing-Zhi Zhou, Yu-Ting Kuang, Zhe Chang +1
In June 2023, multiple pulsar timing array collaborations provided evidence for the existence of a stochastic gravitational wave background. Scalar induced gravitational waves (SIG…
Scalar induced gravitational waves in f(R) gravity
Jing-Zhi Zhou, Yu-Ting Kuang, Di Wu +3
We investigate the first and second order cosmological perturbation equations in f(R) modified gravity theory and provide the equation of motion of second order scalar induced grav…
Induced gravitational waves for arbitrary higher orders: vertex rules and loop diagrams in cosmological perturbation theory
Jing-Zhi Zhou, Yu-Ting Kuang, Di Wu +2
Gravitational waves induced by primordial perturbations serve as crucial probes for studying the early universe, providing a significant window into potential new physics during co…
Probing scalar induced gravitational waves with PTA and LISA: The Importance of third order correction
Zhe Chang, Yu-Ting Kuang, Di Wu +1
We revisit the calculation of third order \acp{SIGW} and extend it from a monochromatic primordial power spectrum to a more general log-normal one. We investigate the impact of thi…
New constraints on primordial non-Gaussianity from missing two-loop contributions of scalar induced gravitational waves
Zhe Chang, Yu-Ting Kuang, Di Wu +2
We analyze the energy density spectrum of \acp{SIGW} using the NANOGrav 15-year data set, thereby constraining the primordial non-Gaussian parameter . For the firs…
Primordial black holes and scalar induced density perturbations: the effects of probability density functions
Jing-Zhi Zhou, Yu-Ting Kuang, Zhe Chang +2
We investigate the second order energy density perturbation induced by small-scale Gaussian and local-type non-Gaussian primordial curvature perturbations. The relative a…
Pulsars as candidates of LHAASO sources J2226+6057, J1908+0621 and J1825-1326: The leptonic origin
Zhe Chang, Yu-Ting Kuang, Xukun Zhang +1
Recently, from 12 -ray Galactic sources, the LHAASO has detected ultrahigh-energy photons up to 1.4PeV. The -ray spectra of the sources J2226+6057, J1908+0621, J1825-1326 and…
Primordial gravitational waves and curvature perturbations induced energy density perturbation
Zhe Chang, Yu-Ting Kuang, Xukun Zhang +1
We study the second order scalar and density perturbations generated by the Gaussian curvature perturbations and primordial gravitational waves in the radiation-dominated era. Afte…
Primordial black holes and third order scalar induced gravitational waves
Zhe Chang, Yu-Ting Kuang, Xukun Zhang +1
The process of \acp{PBH} formation would be inevitably accompanied by \acp{SIGW}. This strong correlation between \acp{PBH} and \acp{SIGW} signals could be a promising approach to…