Proposal for a Cosmic Axion Spin Precession Experiment (CASPEr)

被引：412

作者：

Budker, Dmitry ^{[1
,2
,7
]}

Graham, Peter W. ^{[3
]}

Ledbetter, Micah ^{[4
]}

Rajendran, Surjeet ^{[3
]}

Sushkov, Alexander O. ^{[5
,6
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA

[3] Stanford Univ, Stanford Inst Theoret Phys, Dept Phys, Stanford, CA 94305 USA

[4] AOSense, Sunnyvale, CA 94085 USA

[5] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[6] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA

[7] Johannes Gutenberg Univ Mainz, Helmholtz Inst Mainz, D-55099 Mainz, Germany

来源：

PHYSICAL REVIEW X | 2014年 / 4卷 / 02期

基金：

美国国家科学基金会;

关键词：

ODD ELECTROMAGNETIC MOMENTS; ELECTRIC-DIPOLE MOMENT; CP CONSERVATION; INVISIBLE-AXION; HARMLESS AXION; INVARIANCE; PARTICLES; COSMOLOGY; NUCLEI; THETA;

D O I：

10.1103/PhysRevX.4.021030

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 CP-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 many orders of magnitude in axionlike-particle parameter space beyond the current astrophysical and laboratory limits. And with established techniques, the proposed experimental scheme has sensitivity to QCD axion masses m(a) less than or similar to 10(-9) eV, corresponding to theoretically well-motivated axion decay constants f(a) greater than or similar to 10(16) GeV. With further improvements, this experiment could ultimately cover the entire range of masses m(a) less than or similar to mu V, complementary to cavity searches.

引用

页数：10

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