PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - Joint T03+T10 Dark Matter + Searches for New Physics
Recent Dark Matter related searches with the $BABAR$ detector.
H. Ahmed*, N. Tasneem  on behalf of the BABAR collaboration
Full text: pdf
Pre-published on: February 14, 2024
Published on: March 21, 2024
We present the most recent $BABAR$ searches for reactions that could simultaneously explain the
presence of dark matter and the matter-antimatter asymmetry in the universe. This scenario predicts B-meson decays
into an ordinary-matter baryon and a dark-sector anti-baryon $\psi_{D}$ with branching fractions accessible at the
B factories. The results are based on the full data set of about 430fb$^{-1}$ collected at the $\Upsilon$(4S) resonance
by the $BABAR$ detector at the PEP-II collider. We search in particular, for decays like $B^{0}\rightarrow \psi_{D}cal{B}$,
where $cal{B}$ is a Standard Model (SM) baryon (proton, $\Lambda$, or $\Lambda_{c}$).
The hadronic recoil method has been applied with one of the B mesons from $\Upsilon$(4S) decay fully reconstructed, while
only one baryon is present in the signal B-meson side. The missing mass of signal B meson is considered as the mass of the
dark particle $\psi_{D}$. Stringent upper limits on the decay branching fraction are derived for $\psi_{D}$ masses
between 1.0 and 4.2 $GeV/c^{2}$.
DOI: https://doi.org/10.22323/1.449.0048
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