385 citations · 2.1k across the 46 of their papers we have counts for
38 papers · 1 filter
Echoes of Global Cosmic Strings
Jeff A. Dror, Antonios Kyriazis
If the Universe underwent a cosmic phase transition, it may have left behind a network of cosmic strings. When these strings arise from the breaking of a gauge symmetry, their deca…
Exploring Invisible New Physics with Exotic Pion Decays
Wolfgang Altmannshofer, Jeff A. Dror, Pierce Giffin +5
We study the sensitivity of past and future stopped-pion experiments to light, invisible dark sector particles produced in exotic pion decays. We consider two-body decays involving…
Axion Production and Detection Using a Dual NMR-type Experiment
Jeff A. Dror, Qiushi Wei, Fengwei Yang
Axions that couple to nuclear spins via the axial current interaction can be both produced and detected using nuclear magnetic resonance (NMR) techniques. In this scheme, nuclei dr…
Cosmic Axion Background Detection Using Resonant Cavity Arrays
Soobeom Chung, Jeff A. Dror
The axion is a well-motivated and generic extension of the Standard Model. If produced in the early universe, axions may still be relativistic today, forming a Cosmic Axion Backgro…
On Pulsar Timing Detection of Ultralight Vector Dark Matter
Jeff A. Dror, Qiushi Wei
Ultralight vector dark matter induces metric fluctuations that generate timing residuals in the arrival times of pulsar emissions through two distinct modes: a fast mode, sourced b…
Ultralight Dark Matter Statistics for Pulsar Timing Detection
Kimberly K. Boddy, Jeff A. Dror, Austin Lam
Fluctuations in ultralight dark matter produce significant metric perturbations, which may be detected by monitoring the arrival times of light from millisecond pulsars. While sear…
Indirect Detection of Hot Dark Matter
Jeff A. Dror, Pearl Sandick, Barmak Shams Es Haghi +1
Cosmologically stable, light particles that came into thermal contact with the Standard Model in the early universe may persist today as a form of hot dark matter. For relics with…
Astrometric Detection of Ultralight Dark Matter
Jeff A. Dror, Sarunas Verner
Ultralight dark matter induces time-dependent perturbations in the spacetime metric, enabling its gravitational direct detection. In this work, we propose using astrometry to detec…
QCD Axion-Mediated Dark Matter
Jeff Dror, Stefania Gori, Pankaj Munbodh
A QCD axion with a decay constant below is a strongly-motivated extension to the Standard Model, though its relic abundance from the misalignment mechanism…
Millicharged Relics Reveal Massless Dark Photons
Asher Berlin, Jeff A. Dror, Xucheng Gan +1
The detection of massless kinetically-mixed dark photons is notoriously difficult, as the effect of this mixing can be removed by a field redefinition in vacuum. In this work, we s…
On the Sensitivity of Spin-Precession Axion Experiments
Jeff A. Dror, Stefania Gori, Jacob M. Leedom +1
A leading direction in the hunt for axion dark matter is to search for its influence on nuclear spins. The detection scheme involves polarizing a sample of nuclei within a strong s…
New Opportunities for Detecting Axion-Lepton Interactions
Wolfgang Altmannshofer, Jeff A. Dror, Stefania Gori
We revisit the theory and constraints on axion-like particles (ALPs) interacting with leptons. We clarify some subtleties in the constraints on ALP parameter space and find several…
Snowmass 2021 White Paper: Cosmogenic Dark Matter and Exotic Particle Searches in Neutrino Experiments
J. Berger, D. Brailsford, K. Choi +15
The signals from outer space and their detection have been playing an important role in particle physics, especially in discoveries of and searches for physics beyond the Standard…
Early-Universe Model Building
Pouya Asadi, Saurabh Bansal, Asher Berlin +37
Theoretical investigations into the evolution of the early universe are an essential part of particle physics that allow us to identify viable extensions to the Standard Model as w…
The Cosmic Axion Background
Jeff A. Dror, Hitoshi Murayama, Nicholas L. Rodd
Existing searches for cosmic axions relics have relied heavily on the axion being non-relativistic and making up dark matter. However, light axions can be copiously produced in the…
Absorption of Sub-MeV Fermionic Dark Matter by Electron Targets
Jeff A. Dror, Gilly Elor, Robert McGehee +1
We study a new class of signals where fermionic dark matter is absorbed by bound electron targets. Fermionic absorption signals in direct detection and neutrino experiments are sen…
Cosmological Tension of Ultralight Axion Dark Matter and its Solutions
Jeff A. Dror, Jacob M. Leedom
A number of proposed and ongoing experiments search for axion dark matter with a mass nearing the limit set by small scale structure (). We con…
Discovering leptonic forces using non-conserved currents
Jeff A. Dror
Differences in lepton number (i.e., , , , or combinations thereof) are not conserved charges in the Standard Model due to the observation of…
Sterile Neutrino Dark Matter in Left-Right Theories
Jeff A. Dror, David Dunsky, Lawrence J. Hall +1
gauge symmetry requires three right-handed neutrinos (), one of which, , can be sufficiently stable to be dark matter. In the early universe,…
Probing muonic forces with neutron star binaries
Jeff A. Dror, Ranjan Laha, Toby Opferkuch
We show that gravitational wave emission from neutron star binaries can be used to discover any generic long-ranged muonic force due to the large inevitable abundance of muons insi…
Absorption of Fermionic Dark Matter by Nuclear Targets
Jeff A. Dror, Gilly Elor, Robert McGehee
Absorption of fermionic dark matter leads to a range of distinct and novel signatures at dark matter direct detection and neutrino experiments. We study the possible signals from f…
Testing Seesaw and Leptogenesis with Gravitational Waves
Jeff A. Dror, Takashi Hiramatsu, Kazunori Kohri +2
We present the possibility that the seesaw mechanism with thermal leptogenesis can be tested using the stochastic gravitational background. Achieving neutrino masses consistent wit…
Direct Detection Signals from Absorption of Fermionic Dark Matter
Jeff A. Dror, Gilly Elor, Robert McGehee
We present a new class of direct detection signals; absorption of fermionic dark matter. We enumerate the operators through dimension six which lead to fermionic absorption, study…
Dark Matter in Very Supersymmetric Dark Sectors
Avital Dery, Jeff A. Dror, Laurel Stephenson Haskins +2
If supersymmetry exists at any scale, regardless of whether it is restored around the weak scale, it may be a good symmetry of the dark sector, enforcing a degeneracy between its l…