Field theory of strong; weak and electromagnetic interactions; astrophysical implications

High energy theory; mathematical physics; string theory

Quantum field theory, String Theory, Quantum Cosmology

Theoretical particle physics; extensions of the Standard Model; collider phenomenology; dark matter models and searches

General relativity and cosmology; kinetic theory; black hole physics; gravitational radiation; lead PI on Binary Black Hole Grand Challenge.

Particle physics; unification of fundamental interactions; cosmology