arxiv: 1210.6750 · v2 · ★pith:PW6RNXVKnew · submitted 2012-10-25 · ✦ hep-ex
Measurement of the B⁰--bar B⁰ oscillation frequency Delta m_d with the decays B⁰ to D^- π^+ and B⁰ to J/ psi K^(*0)
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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 collisions at $\sqrt{s} = 7\,$TeV, and is found to be $\Delta m_d = 0.5156 \pm 0.0051\,($stat.$) \pm 0.0033\,($syst.$)\,$ps$^{-1}$. The measurement is based on results from analyses of the decays $B^0 \to D^- \pi^+$ ($D^- \to K^+ \pi^- \pi^-$) and $B^0 \to J/ \psi K^{*0}$ ($ J/ \psi \to \mu^+ \mu^-$, $K^{*0} \to K^+ \pi^-$) and their charge conjugated modes.
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