A Photon Regeneration Experiment for Axionlike Particle Search using X-rays

Understand

In this letter we describe our novel photon regeneration experiment for the axionlike particle search using a x-ray beam with a photon energy of 50.2 keV and 90.7 keV, two superconducting magnets of 3 T, and a Ge detector with a high quantum efficiency.

• A counting rate of regenerated photons compatible with zero has been measured.
• The corresponding limits on the pseudoscalar axionlike particle-two photon coupling constant is obtained as a function of the particle mass.
• Our setup widens the energy window of purely terrestrial experiments devoted to the axionlike particle search by coupling to two photons.