Kavli Affiliate: Jia Liu
| First 5 Authors: Haipeng An, Shuailiang Ge, Jia Liu, Zhiyao Lu,
| Summary:
In this study, we propose an investigation into dark photon dark matter
(DPDM) within the infrared frequency band, utilizing highly sensitive infrared
light detectors commonly integrated into space telescopes, such as the James
Webb Space Telescope (JWST). The presence of DPDM induces electron oscillations
in both the reflectors and the interior of the detectors. Consequently, these
oscillating electrons can emit monochromatic electromagnetic waves with a
frequency almost equivalent to the mass of DPDM. By estimating the signal
generated by DPDM inside the detector and comparing with observation data, we
establish constraints on the kinetic mixing between the photon and dark photon
within the range [10, 500] THz. Despite JWST not being optimized for DPDM
searches, our findings reveal constraints comparable to those obtained from the
XENON1T experiment in the laboratory, as well as astrophysical constraints from
solar emission. Additionally, we propose to modify the configuration of JWST
optical elements to focus the DPDM induced signal onto the detector. By
employing the stationary phase approximation, we can demonstrate that when the
size of the reflector significantly exceeds the wavelength of the
electromagnetic wave, the contribution to the electromagnetic wave field at a
given position primarily stems from the surface unit perpendicular to the
relative position vector. This simplification results in the reduction of
electromagnetic wave calculations to ray optics. We show that by rearranging
the position of reflectors, JWST can achieve a sensitivity stronger than the
existing limits by 1 or 2 orders of magnitude.
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