690 citations · 10.7k across the 91 of their papers we have counts for
52 papers · 1 filter
Searching for heavy charged relics in the Earth
Reza Ebadi, Peter W. Graham, Surjeet Rajendran +2
We propose a method for detecting an ambient density of heavy, electrically-charged particles. Such particles would impact the Earth, lose energy in terrestrial matter, and become…
A Hunt for Magnetic Signatures of Hidden-Photon and Axion Dark Matter in the Wilderness
Ibrahim A. Sulai, Saarik Kalia, Ariel Arza +17
Earth can act as a transducer to convert ultralight bosonic dark matter (axions and hidden photons) into an oscillating magnetic field with a characteristic pattern across its surf…
Detecting Nanometer-Scale New Forces with Coherent Neutron Scattering
Zachary Bogorad, Peter W. Graham, Giorgio Gratta
Significant effort has been devoted to searching for new fundamental forces of nature. At short length scales (below approximately 10 nm), the strongest experimental constraints co…
The storage ring proton EDM experiment
Jim Alexander, Vassilis Anastassopoulos, Rick Baartman +74
We describe a proposal to search for an intrinsic electric dipole moment (EDM) of the proton with a sensitivity of \targetsens, based on the vertical rotation of the polarization o…
Electric dipole moments and the search for new physics
Ricardo Alarcon, Jim Alexander, Vassilis Anastassopoulos +140
Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well beyond those reached directly at high energy colliders. Discrim…
Earth as a transducer for axion dark-matter detection
Ariel Arza, Michael A. Fedderke, Peter W. Graham +2
We demonstrate that ultralight axion dark matter with a coupling to photons induces an oscillating global terrestrial magnetic field signal in the presence of the background geomag…
Millicharged dark matter detection with ion traps
Dmitry Budker, Peter W. Graham, Harikrishnan Ramani +3
We propose the use of trapped ions for detection of millicharged dark matter. Millicharged particles will scatter off the ions, giving a signal either in individual events or in th…
Search for dark-photon dark matter in the SuperMAG geomagnetic field dataset
Michael A. Fedderke, Peter W. Graham, Derek F. Jackson Kimball +1
In our recent companion paper [arXiv:2106.00022], we pointed out a novel signature of ultralight kinetically mixed dark-photon dark matter. This signature is a quasi-monochromatic,…
Warming up cold inflation
William DeRocco, Peter W. Graham, Saarik Kalia
The axion is a well-motivated candidate for the inflaton, as the radiative corrections that spoil many single-field models are avoided by virtue of its shift symmetry. However, axi…
Earth as a transducer for dark-photon dark-matter detection
Michael A. Fedderke, Peter W. Graham, Derek F. Jackson Kimball +1
We propose the use of the Earth as a transducer for ultralight dark-matter detection. In particular we point out a novel signal of kinetically mixed dark-photon dark matter: a mono…
Dark Energy Radiation
Kim V. Berghaus, Peter W. Graham, David E. Kaplan +2
We show that if dark energy evolves in time, its dynamical component could be dominated by a bath of dark radiation. Within current constraints this radiation could have up to $\si…
Exploring the robustness of stellar cooling constraints on light particles
William DeRocco, Peter W. Graham, Surjeet Rajendran
Stellar cooling arguments place strict restrictions on a wide variety of models of new physics. In this paper, we argue that mechanisms to evade these constraints are restricted by…
Storage Ring Probes of Dark Matter and Dark Energy
Peter W. Graham, Selcuk Haciomeroglu, David E. Kaplan +3
We show that proton storage ring experiments designed to search for proton electric dipole moments can also be used to look for the nearly dc spin precession induced by dark energy…
Muons in supernovae: implications for the axion-muon coupling
Robert Bollig, William DeRocco, Peter W. Graham +1
The high temperature and electron degeneracy attained during a supernova allow for the formation of a large muon abundance within the core of the resulting proto-neutron star. If n…
White Dwarf Bounds on CHAMPs
Michael A. Fedderke, Peter W. Graham, Surjeet Rajendran
White dwarfs (WD) effectively act as high-gain amplifiers for relatively small energy deposits within their volume via their supernova instability. In this paper, we consider the w…
Minimal Warm Inflation
Kim V. Berghaus, Peter W. Graham, David E. Kaplan
Slow-roll inflation is a successful paradigm. However we find that even a small coupling of the inflaton to other light fields can dramatically alter the dynamics and predictions o…
Supernova signals of light dark matter
William DeRocco, Peter W. Graham, Daniel Kasen +2
Dark matter direct detection experiments have poor sensitivity to a galactic population of dark matter with mass below the GeV scale. However, such dark matter can be produced copi…
Relaxation of the Cosmological Constant
Peter W. Graham, David E. Kaplan, Surjeet Rajendran
We present a model that naturally tunes a large positive cosmological constant to a small cosmological constant. A slowly rolling scalar field decreases the cosmological constant t…
Observable signatures of dark photons from supernovae
William DeRocco, Peter W. Graham, Daniel Kasen +2
A dark photon is a well-motivated new particle which, as a component of an associated dark sector, could explain dark matter. One strong limit on dark photons arises from excessive…
White Dwarfs as Dark Matter Detectors
Peter Graham, Ryan Janish, Vijay Narayan +2
Dark matter that is capable of sufficiently heating a local region in a white dwarf will trigger runaway fusion and ignite a type Ia supernova. This was originally proposed in Grah…
The Stochastic Axion Scenario
Peter W. Graham, Adam Scherlis
For the minimal QCD axion model it is generally believed that overproduction of dark matter constrains the axion mass to be above a certain threshold, or at least that the initial…
Optimal Impedance Matching and Quantum Limits of Electromagnetic Axion and Hidden-Photon Dark Matter Searches
Saptarshi Chaudhuri, Kent Irwin, Peter W. Graham +1
For the first time, we determine the properties of the optimal single-moded, linear, passive search for electromagnetic coupling to axion and hidden-photon dark matter, subject to…
Spin Precession Experiments for Light Axionic Dark Matter
Peter W. Graham, David E. Kaplan, Jeremy Mardon +4
Axion-like particles are promising candidates to make up the dark matter of the universe, but it is challenging to design experiments that can detect them over their entire allowed…
US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report
Marco Battaglieri, Alberto Belloni, Aaron Chou +248
This white paper summarizes the workshop "U.S. Cosmic Visions: New Ideas in Dark Matter" held at University of Maryland on March 23-25, 2017.