Measurement of the $B^0$--${\bar{B}}^0$ oscillation frequency $\Delta m_d$ with the decays $B^0\to D^{-}{\pi }^{+}$ and $B^0\to J/\psi K^{\ast 0}$

LHCb collaboration, R. Aaij, C. Abellan Beteta +621

The $B^0$--${\bar{B}}^0$ oscillation frequency $\Delta m_d$ is measured by the LHCb experiment using a dataset corresponding to an integrated luminosity of $1.0$fb${}^{-1}$ of proton-proton…