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Protogalactic Extension of the Parker Bound
M. J. Lewis, Katherine Freese, Gregory Tarle
We extend the Parker bound on the galactic flux of magnetic monopoles. By requiring that a small initial seed field must survive the collapse of the protogalaxy, before an…
Can Geodesics in Extra Dimensions Solve the Cosmological Horizon Problem?
Daniel J. H. Chung, Katherine Freese
We demonstrate a non-inflationary solution to the cosmological horizon problem in scenarios in which our observable universe is confined to three spatial dimensions (a three-brane)…
CP-Violating Effects in Neutralino Scattering and Annihilation
Paolo Gondolo, Katherine Freese
We show that in some regions of supersymmetric parameter space, CP violating effects that mix the CP-even and CP-odd Higgs bosons can enhance the neutralino annihilation rate, and…
Cosmological Challenges in Theories with Extra Dimensions and Remarks on the Horizon Problem
Daniel J. H. Chung, Katherine Freese
We consider the cosmology that results if our observable universe is a 3-brane in a higher dimensional universe. In particular, we focus on the case where our 3-brane is located at…
Limits on Stellar Objects as the Dark Matter of Our Halo: Nonbaryonic Dark Matter Seems to be Required
Katherine Freese, Brian Fields, David Graff
The nature of the dark matter in the Halo of our Galaxy remains a mystery. Arguments are presented that the dark matter does not consist of ordinary stellar or substellar objects,…
Chemical Abundance Constraints on White Dwarfs as Halo Dark Matter
Brian D. Fields, Katherine Freese, David S. Graff
We examine the chemical abundance constraints on a population of white dwarfs in the Halo of our Galaxy. We are motivated by microlensing evidence for massive compact halo objects…