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This content will become publicly available on February 8, 2019

Title: Searching for axion stars and Q-balls with a terrestrial magnetometer network

Light (pseudo-)scalar fields are promising candidates to be the dark matter in the Universe. Under certain initial conditions in the early Universe and/or with certain types of self-interactions, they can form compact dark-matter objects such as axion stars or Q-balls. Direct encounters with such objects can be searched for by using a global network of atomic magnetometers. It is shown that for a range of masses and radii not ruled out by existing observations, the terrestrial encounter rate with axion stars or Q-balls can be sufficiently high (at least once per year) for a detection. Furthermore, it is shown that a global network of atomic magnetometers is sufficiently sensitive to pseudoscalar couplings to atomic spins so that a transit through an axion star or Q-ball could be detected over a broad range of unexplored parameter space.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [6] ;  [8]
  1. Cal State, East Bay
  2. UC, Berkeley
  3. Fermilab
  4. Perimeter Inst. Theor. Phys.
  5. Jagiellonian U.
  6. Fribourg U.
  7. Helmholtz Inst., Mainz
  8. Mainz U.
Publication Date:
Report Number(s):
FERMILAB-PUB-17-559-T; arXiv:1710.04323
1630435
Grant/Contract Number:
AC02-07CH11359; de-sc0014664
Type:
Accepted Manuscript
Journal Name:
Phys.Rev.
Additional Journal Information:
Journal Volume: D97; Journal Issue: 4
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1413681
Alternate Identifier(s):
OSTI ID: 1419820