The shadow of dark matter as a shadow of string theory

Abstract

We point out that string theory can solve the conundrum to explain the emergence of an electroweak dipole moment from electroweak singlets through induction of those dipole moments through a Kalb-Ramond dipole coupling. This can generate a U_Y(1) portal to dark matter and entails the possibility that the U_Y(1) gauge field is related to a fundamental vector field for open string interactions. The requirement to explain the observed dark matter abundance relates the coupling scale in the corresponding low-energy effective U_Y(1) portal to the dark matter mass. The corresponding electron recoil cross sections for a single dipole coupled dark matter species are generically below the current limits from XENON, SuperCDMS and SENSEI, except in the GeV mass range if the electric dipole coupling becomes stronger than the magnetic coupling. Furthermore, the recoil cross sections are above the neutrino floor and the U_Y(1) portal can be tested with longer exposure or larger detectors. Discovery of electroweak dipole dark matter would therefore open an interesting window into string phenomenology.

arXiv comment8 pages, 2 figures. v3 also discusses the effects of an electric dipole coupling on electron recoils, in addition to the magnetic dipole coupling

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Cited by in corpus (4)

• Implications of axionic hair on shadow of M87*
• The shadow of dark matter as a shadow of string theory: String origin of the dipole term
• Experimental signatures of Kalb-Ramond-like particles
• Constraints on antisymmetric tensor fields from Bhabha scattering