2 citations · 3 across the 12 of their papers we have counts for
13 papers
High Energy Neutrinos, Gravitational Waves, and Dark Matter from a Cosmological First Order Phase Transition
James M. Cline, Savas Stoica, Yong Xu
We investigate high energy neutrinos (HEs) from the decay of superheavy dark matter (DM) produced during a cosmological first order phase transition. Adopting the filtered DM pr…
Irreducible Graviton Floor from Reheating
James M. Cline, Yong Xu
Inflaton decay inevitably emits gravitons through bremsstrahlung during reheating. We show that the soft part of this emission amplitude, fixed by Weinberg's soft-graviton theorem,…
Probing Bose-enhanced Inflaton Decay with Gravitational Waves
Nicolás Bernal, Quan-feng Wu, Xun-Jie Xu +1
We investigate cosmic reheating dynamics in the presence of a transient condensate formed by bosonic decay products of the inflaton. We show that the emergence of such a condensate…
Sterile Neutrino Dark Matter as a Probe of Inflationary Reheating
James M. Cline, Yong Xu
Sterile neutrinos offer a minimal and testable explanation for dark matter (DM), with their radiative decay actively searched for in X-ray observations. We show that cold sterile n…
The flat tail in the burst energy distribution of FRB 20240114A
Yu-Xiang Huang, Jun-Shuo Zhang, Heng Xu +19
Fast Radio Bursts (FRBs) are enigmatic millisecond-duration radio transients of extra-galactic origin, whose underlying mechanisms and progenitors remain poorly understood. FRBs ar…
Pre-thermalized Gravitational Waves
Nicolás Bernal, Quan-feng Wu, Xun-Jie Xu +1
We investigate a novel gravitational wave (GW) production mechanism from gravitons generated during the pre-thermal phase of cosmic reheating, where the energy density is dominated…
Probing Gravitational Dark Matter with Ultra-high Frequency Gravitational Waves
Yong Xu
The evidence for the existence of dark matter (DM) is compelling, yet its nature remains elusive. A minimal scenario involves DM interacting solely through gravity. However, the de…
Modular invariant inflation and reheating
Gui-Jun Ding, Si-Yi Jiang, Yong Xu +1
We use modular symmetry as an organizing principle that attempts to simultaneously address the lepton flavor puzzle, inflation, and post-inflationary reheating. We demonstrate this…
Thermal Gravitational Waves During Reheating
Nicolás Bernal, Yong Xu
In this work, we revisit the generation of stochastic gravitational waves (GWs) from interactions in the thermal plasma. We extend the existing literature by incorporating the rehe…
Ultra-high Frequency Gravitational Waves from Scattering, Bremsstrahlung and Decay during Reheating
Yong Xu
We investigate ultra-high frequency gravitational waves (GWs) from gravitons generated during inflationary reheating. Specifically, we study inflaton scattering with its decay prod…
Probing Reheating with Gravitational Waves from Graviton Bremsstrahlung
Basabendu Barman, Nicolás Bernal, Simon Cléry +3
In this talk, based on arXiv:2301.11345, arXiv:2305.16388, arXiv:2311.12694, we discuss the production of primordial gravitational waves (GW) sourced by graviton bremsstrahlung dur…
Resonant Reheating
Basabendu Barman, Nicolás Bernal, Yong Xu
We investigate a novel reheating scenario proceeding through -channel inflaton annihilation, mediated by a massive scalar. If the inflaton oscillates around the minimum of a…
Probing Reheating with Graviton Bremsstrahlung
Nicolás Bernal, Simon Cléry, Yann Mambrini +1
We investigate the stochastic gravitational wave (GW) spectrum resulting from graviton bremsstrahlung during inflationary reheating. We focus on an inflaton oscillating around…