Observation of the ${\Lambda }_{\mathrm{b}}^0$ $\to$ J/$\psi \Lambda \varphi$ decay in proton-proton collisions at $\sqrt{s}=$ 13 TeV

CMS Collaboration

The observation of the ${\Lambda }_{\mathrm{b}}^0$ $\to$ J/$\psi \Lambda \varphi$ decay is reported using proton-proton collision data collected at $\sqrt{s}=$ 13 TeV by the CMS experiment at the LHC in 2018…