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

Abstract : 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.
Type de document :
Article dans une revue
Physics Letters B, Elsevier, 2013, 719, pp.318-325. 〈10.1016/j.physletb.2013.01.019〉

http://hal.in2p3.fr/in2p3-00749987
Contributeur : Claudine Bombar <>
Soumis le : jeudi 8 novembre 2012 - 17:11:53
Dernière modification le : mercredi 4 janvier 2017 - 16:23:40

### Citation

R. Aaij, I. De Bonis, D. Decamp, Ph. Ghez, P. Hopchev, et al.. Measurement of the $B^0$--$\bar B^0$ oscillation frequency $\Delta m_d$ with the decays $B^0 \to D^- \pi^+$ and $B^0 \to J\ \psi K^{*0}$. Physics Letters B, Elsevier, 2013, 719, pp.318-325. 〈10.1016/j.physletb.2013.01.019〉. 〈in2p3-00749987〉

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