570 citations · 2.5k across the 34 of their papers we have counts for
18 papers · 1 filter
Axiverse Lampposts
Masha Baryakhtar, David Cyncynates, Ella Henry
The string axiverse predicts a unique connection between the high scales approachable only through theory and the low energies within reach of experimental verification: a multitud…
Dark Matter Haloscope with a Disordered Dielectric Absorber
Stewart Koppell, Otavio D. A. R. Bittencourt, Dip Joti Paul +3
Light dark matter candidates such as axions and dark photons generically couple to electromagnetism, yielding dark-matter-to-photon conversion as a key search strategy. In addition…
Searching for coupled, hyperlight scalars across cosmic history
Masha Baryakhtar, Olivier Simon, Zachary J. Weiner
Cosmological scalar fields coupled to the Standard Model drive temporal variations in the fundamental constants that grow with redshift, positioning the early Universe as a powerfu…
Pi in the Sky: Neutron Stars with Exceptionally Light QCD Axions
Mia Kumamoto, Junwu Huang, Christian Drischler +2
We present a comprehensive study of axion condensed neutron stars that arise in models of an exceptionally light axion that couples to quantum chromodynamics (QCD). These axions so…
Snowmass Theory Frontier: Astrophysics and Cosmology
Daniel Green, Joshua T. Ruderman, Benjamin R. Safdi +84
We summarize progress made in theoretical astrophysics and cosmology over the past decade and areas of interest for the coming decade. This Report is prepared as the TF09 "Astrophy…
Report of the Topical Group on Cosmic Probes of Dark Matter for Snowmass 2021
Alex Drlica-Wagner, Chanda Prescod-Weinstein, Hai-Bo Yu +37
Cosmological and astrophysical observations currently provide the only robust, positive evidence for dark matter. Cosmic probes of dark matter, which seek to determine the fundamen…
Dark Matter In Extreme Astrophysical Environments
Masha Baryakhtar, Regina Caputo, Djuna Croon +37
Exploring dark matter via observations of extreme astrophysical environments -- defined here as heavy compact objects such as white dwarfs, neutron stars, and black holes, as well…
Black hole superradiance of self-interacting scalar fields
Masha Baryakhtar, Marios Galanis, Robert Lasenby +1
Black hole superradiance is a powerful probe of light, weakly-coupled hidden sector particles. Many candidate particles, such as axions, generically have self-interactions that can…
Electromagnetic Signals of Inelastic Dark Matter Scattering
Masha Baryakhtar, Asher Berlin, Hongwan Liu +1
Light dark sectors in thermal contact with the Standard Model naturally produce the observed relic dark matter abundance and are the targets of a broad experimental search program.…
Axion and hidden photon dark matter detection with multilayer optical haloscopes
Masha Baryakhtar, Junwu Huang, Robert Lasenby
A well-motivated class of dark matter candidates, including axions and dark photons, takes the form of coherent oscillations of a light bosonic field. If the dark matter couples to…
Dark Kinetic Heating of Neutron Stars and An Infrared Window On WIMPs, SIMPs, and Pure Higgsinos
Masha Baryakhtar, Joseph Bramante, Shirley Weishi Li +2
We identify a largely model-independent signature of dark matter interactions with nucleons and electrons. Dark matter in the local galactic halo, gravitationally accelerated to ov…
Black Hole Superradiance Signatures of Ultralight Vectors
Masha Baryakhtar, Robert Lasenby, Mae Teo
The process of superradiance can extract angular momentum and energy from astrophysical black holes (BHs) to populate gravitationally-bound states with an exponentially large numbe…
Black Hole Mergers and the QCD Axion at Advanced LIGO
Asimina Arvanitaki, Masha Baryakhtar, Savas Dimopoulos +2
In the next few years Advanced LIGO (aLIGO) may see gravitational waves (GWs) from thousands of black hole (BH) mergers. This marks the beginning of a new precision tool for physic…
Discovering the QCD Axion with Black Holes and Gravitational Waves
Asimina Arvanitaki, Masha Baryakhtar, Xinlu Huang
Advanced LIGO may be the first experiment to detect gravitational waves. Through superradiance of stellar black holes, it may also be the first experiment to discover the QCD axion…
The Last Vestiges of Naturalness
Asimina Arvanitaki, Masha Baryakhtar, Xinlu Huang +2
Direct LHC bounds on colored SUSY particles now corner naturalness more than the measured value of the Higgs mass does. Bounds on the gluino are of particular importance, since it…
Axion Mediation
Masha Baryakhtar, Edward Hardy, John March-Russell
We explore the possibility that supersymmetry breaking is mediated to the Standard Model sector through the interactions of a generalized axion multiplet that gains a F-term expect…
Supersymmetry in the shadow of photini
Masha Baryakhtar, Nathaniel Craig, Ken Van Tilburg
Additional neutral gauge fermions -- "photini" -- arise in string compactifications as superpartners of U(1) gauge fields. Unlike their vector counterparts, the photini can acquire…
Graviton Phenomenology of Linear Dilaton Geometries
Masha Baryakhtar
Five-dimensional geometries with a linearly varying dilaton background arise as gravity duals of TeV Little String Theories (LSTs) and provide a solution of the hierarchy problem t…