The simplest ΛCDM model provides a good fit to a large span of cosmological data but
harbors large areas of phenomenology and ignorance. With the improvement of the number …

Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

We perform a comprehensive study of Milky Way (MW) satellite galaxies to constrain the
fundamental properties of dark matter (DM). This analysis fully incorporates inhomogeneities …

A bstract We consider the constraints from Supernova 1987A on particles with small
couplings to the Standard Model. We discuss a model with a fermion coupled to a dark …

This book lays out the scientific goals to be addressed by the next-generation ground-based
cosmic microwave background experiment, CMB-S4, envisioned to consist of dedicated …

We present a new paradigm for achieving thermal relic dark matter. The mechanism arises
when a nearly secluded dark sector is thermalized with the standard model after reheating …

We study the direct detection prospects for a representative set of simplified models of sub-
GeV dark matter (DM), accounting for existing terrestrial, astrophysical and cosmological …

A bstract Dark matter in the sub-GeV mass range is a theoretically motivated but largely
unexplored paradigm. Such light masses are out of reach for conventional nuclear recoil …

This report, based on the Dark Sectors workshop at SLAC in April 2016, summarizes the
scientific importance of searches for dark sector dark matter and forces at masses beneath …

The proposed LDMX experiment would provide roughly a meter-long region of instrumented
tracking and calorimetry that acts as a beam stop for multi-GeV electrons in which each …