Constraining the gravitational coupling of axion dark matter at LIGO

  title={Constraining the gravitational coupling of axion dark matter at LIGO},
  author={Sunghoon Jung and Taehun Kim and J. Soda and Yuko Urakawa},
  journal={Physical Review D},
The axion-gravity Chern-Simons coupling is well motivated but is relatively weakly constrained, partly due to difficult measurements of gravity. We study the sensitivity of LIGO measurements of chirping gravitational waves (GWs) on such coupling. When the frequency of the propagating GW matches with that of the coherent oscillation of axion dark matter field, the decay of axions into gravitons can be stimulated, resonantly enhancing the GW. Such a resonance peak can be detected at LIGO as a… 

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