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arXiv · 2610.29598

Electromagnetic multipoles of Majorana spin-3/2 dark matter particles and implications for direct detection

Alejandro Ibarra·Onur Yonar
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Abstract

We investigate the electromagnetic interactions of Majorana spin-3/2 dark matter and their implications for direct detection experiments. We derive model independent constraints on the three electromagnetic multipole moments of the spin-3/2 dark matter allowed by the gauge and Lorentz-invariances from the non-observation of dark matter induced nuclear recoils in direct detection experiments. We then calculate the expected values of the multipole moments in two concrete particle physics scenarios: the gravitino in supergravity models, and a simplified model where a spin-3/2 particle interacts with an electrically charged spin-1/2 fermion and a vector boson.

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Alejandro Ibarra, Onur Yonar. 2026-10-21. Electromagnetic multipoles of Majorana spin-3/2 dark matter particles and implications for direct detection. https://arxiv.org/abs/2610.29598

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