21 citations · 69 across the 9 of their papers we have counts for
9 papers
Newtonian potential from scattering amplitudes in super-renormalizable gravity
Haiyuan Feng, Rong-Jia Yang, Jinjun Zhang
Based on the classical limit of relativistic scattering amplitudes, we compute the coupling between a general super-renormalizable gravity and massive scalar particles. This allows…
The stability of the de-Sitter universe in nonlocal gravity
Haiyuan Feng, Rong-Jia Yang
We constructed the ghost-free condition for nonlocal gravity using de-Sitter background field expansion and identified the structure of the nontrivial form factors. Our analysis sh…
Thin accretion disk around black hole in Einstein-Maxwell-scalar theory
Yingdong Wu, Haiyuan Feng, Wei-Qiang Chen
We examine the accretion process in a thin disk surrounding a supermassive black hole within the framework of Einstein-Maxwell-scalar (EMS) gravity. Our investigation aims to eluci…
Thin accretion disk and shadow of Kerr-Sen black hole in Einstein-Maxwell-dilaton-axion gravity
Haiyuan Feng, Rong-Jia Yang, Wei-Qiang Chen
We investigate the thin disk and shadow of Kerr-Sen black hole in Einstein-Maxwell-dilaton-axion gravity. The results reveal that as the dilaton parameter increase, the energ…
Stability of the de-Sitter universe: One-loop nonlocal gravity
Haiyuan Feng, Yi Liao, Rong-Jia Yang
With the method of the background field expansion, we investigate the one-loop quantization of the Euclidean nonlocal model in the de-Sitter universe. We obtain the ghost-fr…
Damping of gravitational waves in f(R) gravity
Haiyuan Feng, Laiyuan Su, Rong-Jia Yang +1
We investigate the damping of gravitational waves (GW) in gravity by matter. By applying the kinetic theory, we examine the first-order approximation of the relativistic Bol…
Choked accretion onto Kerr-Sen black holes in Einstein-Maxwell-dilaton-axion gravity
Haiyuan Feng, Yingdong Wu, Rong-Jia Yang +1
We investigate the process of an ultrarelativistic fluid accreted onto axisymmetric Kerr-Sen black holes in Einstein-Maxwell-dilaton-axion theory. We obtain the solution describing…
Adiabatic accretion onto black holes in Einstein-Maxwell-scalar theory
Haiyuan Feng, Miao Li, Gui-Rong Liang +1
We study the adiabatic accretion process of ordinary baryonic gas onto spherically symmetric black holes in Einstein-Maxwell-scalar theory, with two parameters and in the c…
Horizon thermodynamics in theory
Haiyuan Feng, Rong-Jia Yang
We investigate whether the new horizon first law still holds in theory. For this complicated theory, we first determine the entropy of black hole via Wald metho…