Aug 15 – 19, 2022
Mainz Institute for Theoretical Physics, Johannes Gutenberg University
Europe/Berlin timezone

Search for exotic low-mass fields with a global magnetometer network

Aug 16, 2022, 11:00 AM
02.430 (Mainz Institute for Theoretical Physics, Johannes Gutenberg University)


Mainz Institute for Theoretical Physics, Johannes Gutenberg University

Staudingerweg 9 / 2nd floor, 55128 Mainz


Sami Khamis (UCLA)


The Global Network of Optical Magnetometers for Exotic physics searches (GNOME) is a network of geographically separated, time-synchronized, optically pumped atomic magnetometers searching for correlated transient signals that might herald exotic physics [1]. Quantum sensor networks provide an additional tool in multi-messenger astronomy to prove high-energy astrophysical events for signals by beyond-standard-model theories. We present a method to use the GNOME to search for coherent, intense bursts of exotic low-mass fields (ELFs) that could be produced alongside gravitational waves (GWs) [2] and fast radio bursts (FRBs). Candidate events are first identified with a model agnostic excess power search [3] and then subjected to a generalized likelihood test. Empirical distributions are employed in both stages to remove explicit assumptions about noise characteristics. We construct Feldman-Cousins confidence belts [4] to constrain detectable ELF signal amplitudes and couplings to standard-model fermions.

[1] S. Afach, D. Budker et al., Physics of the Dark Universe, 22, 162-180 (2018)

[2] Dailey, C., Bradley, C., Jackson Kimball, D.F. et al., Nat Astron 5, 150–158 (2021)

[3] W. G. Anderson, P. R. Brady, et al., Phys. Rev. D 63, 042003 (2001)

[4] G. J. Feldman and R. D. Cousins Phys., Rev. D 57, 3873 (1998)

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