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Area of Science:

  • Cosmology and astrophysics
  • Particle physics
  • Gravitational lensing

Background:

  • Axionlike particles (ALPs) are hypothetical particles proposed as a component of dark matter.
  • The interaction between photons and ALPs can induce a phenomenon known as birefringence.
  • Gravitational lensing, the bending of light by massive objects, provides a unique cosmic laboratory for studying fundamental physics.

Purpose of the Study:

  • To establish strong gravitational lens systems as robust probes for detecting axionlike particles (ALPs).
  • To utilize the birefringence induced by photon-ALP interactions to constrain ALP properties.
  • To apply a novel method to a specific lens system to derive constraints on ALP-photon coupling.

Main Methods:

  • Employing strong gravitational lens systems with multiple images of polarized background sources.
  • Measuring the differential birefringence caused by the interaction of photons with ALPs.
  • Analyzing the polarized light from the gravitationally lensed system CLASS B1152+199.

Main Results:

  • Constraining the ALP-photon coupling to be less than or equal to 9.2×10⁻¹¹ to 7.7×10⁻⁸ GeV⁻¹ at 95% confidence level.
  • Deriving these constraints for an ALP mass range between 3.6×10⁻²¹ and 4.6×10⁻¹⁸ eV.
  • Demonstrating that this method alleviates systematic and astrophysical uncertainties.

Conclusions:

  • Strong gravitational lens systems offer a powerful new avenue for probing axionlike particles and dark matter.
  • The applied method provides stringent constraints on the ALP-photon coupling, advancing the search for new physics.
  • Future studies with larger samples of gravitational lens systems are expected to yield even more precise constraints on ALP properties.