PoS - Proceedings of Science
Volume 398 - The European Physical Society Conference on High Energy Physics (EPS-HEP2021) - T03: Dark Matter
Search for self-interacting dark matter and other dark sector searches with the BABAR detector
G. Eigen*  on behalf of the BABAR collaboration
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Pre-published on: January 12, 2022
Published on: May 12, 2022
A new class of dark matter models introduces a dark sector with new Dirac fermions charged under an additional U(1) gauge group. The corresponding gauge boson, the dark photon $A^\prime$, has an MeV/$c^2$-GeV/$c^2$ mass and couples to the Standard Model photon (and Z) via kinetic mixing. Fermionic bound states ("darkonium" $\Upsilon_{\rm D}$) could form if the dark sector coupling constant is strong enough. We present a search for dark sector bound states ($\Upsilon_{\rm D}$) in $e^+ e^- \rightarrow \gamma \Upsilon_{\rm D}$, $\Upsilon_{\rm D} \rightarrow A^\prime A^\prime A^\prime$, $A^\prime \rightarrow X^+ X^- ~(X=e, \mu, \pi)$ decays for 0.02~GeV$/c^2~ \le m_{\rm A^\prime} \le $ 1.0 GeV$/c^2$, 1~GeV$/c^2~\le m_{\Upsilon_{\rm D}} \le$10 GeV$/c^2$ using the full data sample collected with the \babar\ detector. Furthermore, axion-like particle and leptophilic dark matter may be produced in $e^+ e^-$ collisions.
DOI: https://doi.org/10.22323/1.398.0184
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