A5042154353- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Neutrino Physics Research
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Particle physics theoretical and experimental studies
New York University
2022
University of Chicago
2018-2020
American Museum of Natural History
2018
Axions with masses of order keV can be produced in great abundance within the Solar core. The majority Sun-produced axions escape to infinity, but a small fraction flux is speeds below velocity. Over time, this process populates basin slow-moving trapped on bound orbits. These decay two photons, yielding an observable signature. We place first limits solar using recent quiescent observations made by NuSTAR x-ray telescope. compare three different methodologies for setting constraints, and...
A bstract In hidden sector models, dark matter does not directly couple to the particle content of Standard Model, strongly suppressing rates at direct detection experiments, while still allowing for large signals from annihilation. this paper, we conduct an extensive study matter, covering a wide range spins, mediator interaction diagrams, and annihilation final states, in each case determining whether annihilations are s -wave (thus enabling efficient universe today). We then go on...
The ANITA experiment, which is designed to detect ultra-high energy neutrinos, has reported the observation of two anomalous events, directed at angles $27^{\circ}$ and $35^{\circ}$ with respect horizontal. At these angles, Earth expected efficiently absorb making origin events unclear motivating explanations involving physics beyond Standard Model. In this study, we consider possibility that ANITA's are result Askaryan emission produced by exotic weakly interacting particles scattering...
We present a formalism for constructing schematic diagrams to depict chaotic three-body interactions in Newtonian gravity. This is done by decomposing each interaction into series of discrete transformations energy- and angular momentum-space. Each time transformation applied, the system changes state as particles re-distribute their energy momenta. These have virtue containing all quantitative information needed fully characterize most bound or unbound through space, including total...