Evan Berkowitz

Lattice QCD input for axion cosmology

One intriguing BSM particle is the QCD axion, which could simultaneously provide a solution to the Strong CP problem and account for some, if not all, of the dark matter density in the universe. This particle is a pNGB of the conjectured Peccei-Quinn (PQ) symmetry of the Standard Model. Its mass and interactions are suppressed by a heavy symmetry breaking scale,

Two-Nucleon Higher Partial-Wave Scattering from Lattice QCD

f_a

Precision lattice test of the gauge/gravity duality at large N

, whose value is roughly greater than

Composite bosonic baryon dark matter on the lattice: SU(4) baryon spectrum and the effective Higgs interaction

10^{9}

Chaos in matrix models and black hole evaporation

GeV (or, conversely, the axion mass,

Nuclear condensate and helium white dwarfs

m_a

A microscopic description of black hole evaporation via holography

, is roughly less than

Stable vortex loops in two-species BECs

10^4\ \mu \text{eV}

Gauged and ungauged: a nonperturbative test

). The density of axions in the universe, which cannot exceed the relic dark matter density and is a quantity of great interest in axion experiments like ADMX, is a result of the early-universe interplay between cosmological evolution and the axion mass as a function of temperature. The latter quantity is proportional to the second derivative of the QCD free energy with respect to the CP-violating phase,

Toward Holographic Reconstruction of Bulk Geometry from Lattice Simulations

\theta