Observation of two resonances in the ${\Lambda }_b^0{\pi }^{\pm }$ systems and precise measurement of ${\Sigma }_b^{\pm }$ and ${\Sigma }_b^{\ast \pm }$ properties

LHCb collaboration, R. Aaij, C. Abellán Beteta +837

The first observation of two structures consistent with resonances in the final states ${\Lambda }_b^0{\pi }^{-}$ and ${\Lambda }_b^0{\pi }^{+}$ is reported using samples of $pp$ collision data collected by the…