Proposal for a Cosmic Axion Spin Precession Experiment (CASPEr)

  title={Proposal for a Cosmic Axion Spin Precession Experiment (CASPEr)},
  author={Dmitry Budker and Peter W. Graham and Micah P. Ledbetter and Surjeet Rajendran and Alexander O. Sushkov},
  journal={Physical Review X},
We propose an experiment to search for QCD axion and axionlike-particle dark matter. Nuclei that are interacting with the background axion dark matter acquire time-varying C P -odd nuclear moments such as an electric dipole moment. In analogy with nuclear magnetic resonance, these moments cause precession of nuclear spins in a material sample in the presence of an electric field. Precision magnetometry can be used to search for such precession. An initial phase of this experiment could cover… 

Figures and Tables from this paper

The cosmic axion spin precession experiment (CASPEr): a dark-matter search with nuclear magnetic resonance

The cosmic axion spin precession experiment (CASPEr) is a nuclear magnetic resonance experiment (NMR) seeking to detect axion and axion-like particles which could make up the dark matter present in

Search for Axionlike Dark Matter through Nuclear Spin Precession in Electric and Magnetic Fields

We report on a search for ultra-low-mass axion-like dark matter by analysing the ratio of the spinprecession frequencies of stored ultracold neutrons and 199Hg atoms for an axion-induced oscillating

On the Sensitivity of Spin-Precession Axion Experiments

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 static magnetic field

A Broadband/Resonant Approach to Axion Dark Matter Detection

When ultralight axion dark matter encounters a static magnetic field, it sources an effective electric current that follows the magnetic field lines and oscillates at the axion Compton frequency. We

Broadband and Resonant Approaches to Axion Dark Matter Detection.

This work considers both resonant and broadband readout circuits and shows that a broadband approach has advantages at small axion masses, and demonstrates potential sensitivity to axionlike dark matter with masses in the range of 10^{-14}-10^{-6}  eV.

A viable QCD axion in the MeV mass range

A bstractThe QCD axion is one of the most compelling solutions of the strong CP problem. There are major current efforts into searching for an ultralight, invisible axion, which is believed to be the

Dark matter targets for axionlike particle searches

Many existing and proposed experiments targeting QCD axion dark matter (DM) can also search for a broad class of axionlike particles (ALPs). We analyze the experimental sensitivities to

Axion Wind Detection with the Homogeneous Precession Domain of Superfluid Helium-3

Axions and axion-like particles may couple to nuclear spins like a weak oscillating effective magnetic field, the “axion wind.” Existing proposals for detecting the axion wind sourced by dark matter

Cosmic axion force

Nambu-Goldstone bosons, or axions, may be ubiquitous. Some of the axions may have small masses and thus serve as mediators of long-range forces. In this paper, we study the force mediated by an

Axion signatures from supernova explosions through the nucleon electric-dipole portal

We consider axions coupled to nucleons and photons only through the nucleon electric-dipole moment (EDM) portal. This coupling is a model-independent feature of QCD axions, which solve the strong CP



New Observables for Direct Detection of Axion Dark Matter

We propose new signals for the direct detection of ultralight dark matter such as the axion. Axion or axionlike particle dark matter may be thought of as a background, classical field. We consider

Axion dark matter detection with cold molecules

Current techniques cannot detect axion dark matter over much of its parameter space, particularly in the theoretically well-motivated region where the axion decay constant f_a lies near the GUT and

Prospects for searching axionlike particle dark matter with dipole, toroidal, and wiggler magnets

In this work, we consider searches for dark matter made of axions or axionlike particles using resonant radio frequency cavities inserted into dipole magnets from particle accelerators, wiggler

Detecting domain walls of axionlike models using terrestrial experiments.

This work takes an example of domain walls generated by an axionlike field with a coupling to the spins of standard-model particles and shows that, if the galactic environment contains a network of such walls, terrestrial experiments aimed at the detection of wall-crossing events are realistic.

Searching for axions and ALPs from string theory

We review searches for closed string axions and axion–like particles (ALPs) in IIB string flux compactifications. For natural values of the background fluxes and TeV scale gravitino mass, the moduli

String Axiverse

String theory suggests the simultaneous presence of many ultralight axions, possibly populating each decade of mass down to the Hubble scale 10−33eV. Conversely the presence of such a plenitude of

First Results of the Full-Scale OSQAR Photon Regeneration Experiment

Recent intensive theoretical and experimental studies shed light on possible new physics beyond the standard model of particle physics, which can be probed with sub-eV energy experiments. In the

Displaced Supersymmetry

A bstractThe apparent absence of light superpartners at the LHC strongly constrains the viability of the MSSM as a solution to the hierarchy problem. These constraints can be significantly alleviated

The Low-Energy Frontier of Particle Physics

Most embeddings of the Standard Model into a more unified theory, in particular those based on supergravity or superstrings, predict the existence of a hidden sector of particles that have only very

Dark matter results from 225 live days of XENON100 data.

A search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso for 13 months during 2011 and 2012, has yielded no evidence for dark matter interactions.