Searching for Exotic Interactions between Antimatter

2025/03/10 by Cong, Lei, Ficek, Filip, Fadeev, Pavel +2
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2503.07161

Abstract

We show that atomic antimatter spectroscopy can be used to search for new bosons that carry spin-dependent exotic forces between antifermions. A comparison of a recent precise measurement of the hyperfine splitting of the 1S and 2S electronic levels of antihydrogen and bound-state quantum electrodynamics theory yields the first tests of positron-antiproton exotic interactions, constraining the dimensionless coupling strengths g_pg_p, g_Vg_V and g_Ag_A, corresponding to the exchange of a pseudoscalar (axionlike), vector, or axial-vector boson, respectively. We also discuss new tests of CPT invariance with exotic spin-dependent and spin-independent interactions involving antimatter.

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