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Cosmological gravitational particle production and its implications for cosmological relics
Cosmological gravitational particle production (CGPP) is the creation of particles in an
expanding universe due solely to their gravitational interaction. These particles can play an …
expanding universe due solely to their gravitational interaction. These particles can play an …
Inflation: theory and observations
Cosmic inflation provides a window to the highest energy densities accessible in nature, far
beyond those achievable in any realistic terrestrial experiment. Theoretical insights into the …
beyond those achievable in any realistic terrestrial experiment. Theoretical insights into the …
Classical cosmological collider physics and primordial features
Features in the inflationary landscape can inject extra energies to inflation models and
produce on-shell particles with masses much larger than the Hubble scale of inflation. This …
produce on-shell particles with masses much larger than the Hubble scale of inflation. This …
Probing leptogenesis with the cosmological collider
Y Cui, ZZ **anyu - Physical Review Letters, 2022 - APS
Leptogenesis is generally challenging to directly test due to the very high energy scales
involved. In this Letter, we propose a new probe for leptogenesis with cosmological collider …
involved. In this Letter, we propose a new probe for leptogenesis with cosmological collider …
Gravitational production of completely dark photons with nonminimal couplings to gravity
A bstract Dark photons are a theorized massive spin-1 particle which can be produced via
various mechanisms, including cosmological gravitational particle production (GPP) in the …
various mechanisms, including cosmological gravitational particle production (GPP) in the …
Improving constraints on inflation with CMB delensing
The delensing of cosmic microwave background (CMB) maps will be increasingly valuable
for extracting as much information as possible from future CMB surveys. Delensing provides …
for extracting as much information as possible from future CMB surveys. Delensing provides …
New ideas in baryogenesis: a snowmass white paper
The Standard Model of Particle Physics cannot explain the observed baryon asymmetry of
the Universe. This observation is a clear sign of new physics beyond the Standard Model …
the Universe. This observation is a clear sign of new physics beyond the Standard Model …
Too Hot to Handle: Searching for Inflationary Particle Production in Planck Data
Non-adiabatic production of massive particles is a generic feature of many inflationary
mechanisms. If sufficiently massive, these particles can leave features in the cosmic …
mechanisms. If sufficiently massive, these particles can leave features in the cosmic …
Particle production during inflation with a nonminimally coupled spectator scalar field
Z Yu, C Fu, ZK Guo - Physical Review D, 2023 - APS
We study the inflationary model with a spectator scalar field χ coupled to both the inflaton
and Ricci scalar. The interaction between the χ field and the gravity, denoted by ξ R χ 2, can …
and Ricci scalar. The interaction between the χ field and the gravity, denoted by ξ R χ 2, can …
Probing cosmological particle production and pairwise hotspots with deep neural networks
Particles with masses much larger than the inflationary Hubble scale, HI, can be pair-
produced nonadiabatically during inflation. Due to their large masses, the produced …
produced nonadiabatically during inflation. Due to their large masses, the produced …