Measurement of $CP$ violation parameters and polarisation fractions in $B_s^0\to J/\psi {\overline{K}}^{\ast 0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +721

The first measurement of $CP$ asymmetries in the decay $B_s^0\to J/\psi {\overline{K}}^{\ast }(892{)}^0$ and an updated measurement of its branching fraction and polarisation fractions…