High Energy Theory, Particle Astrophysics and Early Universe Cosmology

Cosmology in the Precision Era and Its Implication for Particle Physics

Cosmology has entered the precision era, and it has raised as many questions as it has answered. We are able to weigh the Universe and have learned that most of its mass is in exotic forms of energy that are not described by the Standard Model of Particle Physics, which governs the most fundamental interactions in nature. The creation of structures in the Universe, from galaxies to clusters of galaxies is governed by a new exotic particle (or particles), dark matter. While cosmology has taught us an immense amount about the Universe, to learn more about its fundamental nature, I utilize tools from particle physics.

My work centers on the boundary of particle theory with cosmology and particle astrophysics.  In recent years, it has focused on the nature of the dark matter. This work has many facets, from terrestrial probes to observations of stars and the shapes of dark matter halos. My work spans both studies of new physics signatures at colliders, physics beyond the Standard Model in the neutrino sector, and the the hunt for the nature of dark matter.  

Terrestrial Probes for New Physics


High energy colliders have been the traditional probe for particle physics.  The search for new physics has been focused on accelerating particles to higher energies in search of new states.  Read more>>

Astrophysical Probes for New Physics


While we carry out precision studies searching for new physics in terrestrial experiments, the cosmos provides a natural laboratory through stars and galaxies.  Read more>>

Early Universe Cosmology


The arrival of precision cosmological data in the last 15 years means that we have unprecedented probes of the Universe in its infancy. Read more>>