Observation of the J/$\psi$$\to$$\mu^+\mu^-\mu^+\mu^-$ decay in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
Phys.Rev.D 109 (2024) L111101, 2024.

Abstract (data abstract)
CERN-LHC-CMS. Observation of the $\mathrm{J}\mspace{-2mu}/\mspace{-2mu}\psi$ to $\mu^{+}\mu^{-}\mu^{+}\mu^{-}$ decay in pp collisions at $\sqrt{s} = 13\,\mathrm{TeV}$.

  • Branching fraction

    10.17182/hepdata.147273.v1/t1

    $\mathrm{J}\mspace{-2mu}/\mspace{-2mu}\psi \to \mu\mu\mu\mu$ branching fraction

  • Branching fraction ratio

    10.17182/hepdata.147273.v1/t2

    $\mathcal{B}(\mathrm{J}\mspace{-2mu}/\mspace{-2mu}\psi \to \mu\mu\mu\mu)$ / $\mathcal{B}(\mathrm{J}\mspace{-2mu}/\mspace{-2mu}\psi \to \mu\mu)$ ratio

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