Modeling the Axion spectrum in a Haloscope Experiment from the Milky Way Dark Matter Dynamics

Abstract

A diversity of physical experiments are trying to detect dark matter in theMilky Way in physical experiments in the Earth, assuming dark matter is made ofweakly interacting fields. In the case of haloscopes, dark matter is assumed tobe the QCD axion which, in the presence of a strong magnetic field, converts toa photon with energy equal to the total axion energy (rest mass plus kineticenergy). Therefore, the spectral line shape observed for the created photonsdepends on the velocity distribution of the dark matter in the laboratory frameof the experiment. This project will use new models for the phase spacedistribution of dark matter in the Milky Way halo based on new constraints thathave been obtained from the Gaia mission, to construct updated models and theiruncertainties for predicting the spectral line of photons that would beproduced by axion dark matter if it were detected.

Advisors
Jordi Miralda-Escudé
References

J. V. Sloan, et al. 2016.  ''Limits on axion-photon coupling or on local axion density: Dependence on  models of the Milky Way's dark matter halo'',  Physics of the Dark Universe, 14, 95.

E. Armengaud, et al. 2019.  ''Physics Potential of the International Axion Observatory (IAXO)'',   JCAP, 6, 47 (arXiv:1904.09155).  

C. G. Palau \& J. Miralda-Escudé 2023.  ''The Oblateness of the Milky Way Dark Matter Halo from the Stellar Streams of  NGC 3201, M68 and Palomar 5'', MNRAS, 524, 2124 (arXiv:2212.03587).