782 citations · 6.7k across the 109 of their papers we have counts for
11 papers · 1 filter
A Simple Dark Matter Model to Explain the LZ Event and Galactic Center Excess
Caleb Gemmell, Dan Hooper, Gordan Krnjaic
We propose that the dark matter (DM) is a pseudo-Dirac fermion with a mass of approximately GeV that couples inelastically to the Standard Model through a hadrophilic spin…
AXIS Could Have Accessed Dark Matter Decays
Joshua W. Foster, Inci Karaaslan, Gordan Krnjaic +1
The Advanced X-ray Imaging Satellite (AXIS) was a mission concept designed to improve upon the sensitivity and spatial resolution of the Chandra X-ray Observatory and XMM-Newton. A…
Getting Warmer: IceCube Nears Freeze Out
Mainak Mukhopadhyay, Gordan Krnjaic
IceCube has recently detected a diffuse population of high-energy neutrinos arising from the Milky Way. We use this high-significance detection to place new limits on dark matter (…
Baryogenesis via the CKM Matrix with Minimal Flavor Violation
Innes Bigaran, Gordan Krnjaic, Kevin Langhoff +1
It is often claimed Standard Model CP violation is insufficient for baryogenesis. We present a counterexample using minimal flavor violation (MFV) in which all CP-violating effects…
Probing the Cosmic Axion Background via Axion-Photon Conversion in Filaments
Duncan Rocha, Gordan Krnjaic, Matthew J. Baldwin
The cosmic axion background (CaB) is a hypothetical population of relativistic axions produced in the early universe. If the CaB is produced from dark matter decays, the axions in…
Expected Sensitivity of the Light Dark Matter eXperiment to Long-Lived Dark Photons and Axion-Like Particles
Torsten Akesson, Clay Barton, Charles Bell +53
The Light Dark Matter eXperiment (LDMX) is an electron-beam fixed-target experiment primarily designed to achieve world-leading, model-independent sensitivity to sub-GeV dark matte…
WIMP-like Dark Matter Without Thermalization At Freeze-Out
Dan Hooper, Gordan Krnjaic, Gabriele Montefalcone
In the standard thermal relic scenario, dark matter remains in chemical equilibrium with the Standard Model radiation bath until freeze-out occurs at , where i…
Primordial Neutron Stars
Gordan Krnjaic, Duncan Rocha, Huangyu Xiao
We propose a novel cosmological scenario in which baryonic neutron stars could plausibly form in the early universe. If baryogenesis initially produces an excessively-large baryon…
New Thermal-Relic Targets for sub-GeV Dark Matter Direct Detection
Xu Han, Gordan Krnjaic
Dark matter direct detection experiments involving electron recoils are beginning to test highly-predictive, thermal-relic milestones for sub-GeV dark matter models. Due to the Lee…
A Universal CMB -Mode Spectrum from Early Causal Tensor Sources
Kylar Greene, Aurora Ireland, Gordan Krnjaic +1
Many early universe scenarios predict post-inflationary tensor perturbations from causality-limited, sub-horizon sources. While the microphysical details may differ, as long as the…
First constraints on causal sources of primordial gravitational waves from BICEP/Keck, SPTpol, SPT-3G, Planck and WMAP -mode data
Jessica A. Zebrowski, Aurora Ireland, Christian L. Reichardt +4
Non-inflationary sources of gravitational waves in the early Universe generically predict causality-limited tensor power spectra at low frequencies. We report the first-ever constr…