Anomalous $U(1)$ Gauge Bosons as Light Dark Matter in String Theory

Abstract

Present experiments are sensitive to very weakly coupled extra gauge symmetries which motivates further investigation of their appearance in string theory compactifications and subsequent properties. We consider extensions of the standard model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching between intersecting D-branes. Assuming that the fundamental string mass scale saturates the current LHC limit and that the theory is weakly coupled, we show that (anomalous) $U(1)$ gauge bosons which propagate into the bulk are compelling light dark matter candidates. We comment on the possible relevance of the $U(1)$ gauge bosons, which are universal in intersecting D-brane models, to the observed $3\sigma$ excess in XENON1T.

7 pages. A few comments and references added. This version matches the one published in Physics Letters B

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Cited by in corpus (11)

• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• Investigating the XENON1T Low-Energy Electronic Recoil Excess Using NEST
• Runaway Gravitational Production of Dark Photons
• Xenon-1T excess as a possible signal of a sub-GeV hidden sector dark matter
• Low Scale String Theory Benchmarks for Hidden Photon Dark Matter Interpretations of the XENON1T Anomaly
• Muon $g-2$ discrepancy within D-brane string compactifications
• Emergent neutrinos from heavy messengers
• String (gravi)photons, "dark brane photons", holography and the hypercharge portal
• Anomalous U(1) Gauge Bosons and String Physics at the Forward Physics Facility
• Prospects of five-dimensional $L_{\mu }-L_{\tau }$ gauge interactions in the light of elastic neutrino-electron scatterings: The scope of the DUNE near detector
• Anomalous $U(1)$ extension of the Standard Model