Searches for a Disformal Scalar 2f Clock Signature in GNSS, GPS, and Pulsar-Timing Data
Searches for a Disformal Scalar 2f Clock Signature in GNSS, GPS, and Pulsar-Timing Data
Preprint on a conformal-plus-disformal scalar EFT predicting a 2f harmonic clock signature alongside the usual 1f signal. The paper derives the observable, reports null searches in GNSS, GPS, and pulsar-timing data, and gives an optical-clock projection under stated assumptions. Quantitative bounds are conditional on the scalar field saturating the local dark matter density.
ultralight dark matter, frequency metrology, effective field theory, disformal scalar, GNSS, GPS, precision tests, scalar dark matter, optical clocks, harmonic search, conformal scalar, pulsar timing arrays
ultralight dark matter, frequency metrology, effective field theory, disformal scalar, GNSS, GPS, precision tests, scalar dark matter, optical clocks, harmonic search, conformal scalar, pulsar timing arrays
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