Measurement of the branching ratio $\Gamma ({\Lambda }_b^0\to \psi (2S){\Lambda }^0)/\Gamma ({\Lambda }_b^0\to J/\psi {\Lambda }^0)$ with the ATLAS detector

ATLAS Collaboration

An observation of the ${\Lambda }_b^0\to \psi (2S){\Lambda }^0$ decay and a comparison of its branching fraction with that of the ${\Lambda }_b^0\to J/\psi {\Lambda }^0$ decay has been made with the ATLAS…