First observation of the decay ${\bar{B}}_s^0\to D^0{K}^{\ast 0}$ and a measurement of the ratio of branching fractions $\frac{\mathcal{B}({\bar{B}}_s^0\to D^0{K}^{\ast 0})}{\mathcal{B}({\bar{B}}^0\to D^0{\rho }^0)}$

LHCb Collaboration, R. Aaij, C. Abellan Beteta +578

The first observation of the decay ${\bar{B}}_s^0\to D^0{K}^{\ast 0}$ using $pp$ data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated l…