Flavour tagged time dependent angular analysis of the $B_s\to J/\psi \varphi$ decay and extraction of $\Delta \Gamma$ and the weak phase ${\varphi }_s$ in ATLAS

ATLAS Collaboration

A measurement of the $B_s\to J/\psi \varphi$ decay parameters, updated to include flavour tagging is reported using $4.9f{b}^{-1}$ of integrated luminosity collected by the ATLAS det…