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

R. Aaij; E. Ben-Haim; M. Benayoun; P. David; L. del Buono; De Bonis; D. Decamp; Ph. Ghez; P. Hopchev; J.-P. Lees; I.V. Machikhiliyan; M.-N. Minard; B. Pietrzyk; S. t'Jampens; V. Tisserand; L. Arrabito; Ziad Ajaltouni; O. Deschamps; Pierre Henrard; Marwa Jahjah-Hussein; R. Lefèvre; L. Li Gioi; S. Monteil; V. Niess; Pascal Perret; Diego Alejandro Roa Romero; Krzysztof Grzegorz Sobczak; S. Barsuk; O. Callot; B. d'Almagne; J. He; B. Jean-Marie; J. Lefrançois; F. Machefert; A. Martin Sanchez; Marie Nicol; P. Robbe; M.-H. Schune; B. Viaud; I. Videau; C. Adrover; E. Aslanides; J. Cogan; B. Khanji; R. Le Gac; O. Leroy; G. Mancinelli; E. Maurice; M. Perrin-Terrin; M. Sapunov; J. Serrano; A. Tsaregorodtsev

doi:10.1016/j.physletb.2011.10.073

Journal articles

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

R. Aaij E. Ben-Haim ¹ M. Benayoun ¹ P. David ¹ L. del Buono ¹ De Bonis ² D. Decamp ² Ph. Ghez ² P. Hopchev ² J.-P. Lees ² I.V. Machikhiliyan ² M.-N. Minard ² B. Pietrzyk ² S. t'Jampens ² V. Tisserand ² L. Arrabito ³ Ziad Ajaltouni ⁴ O. Deschamps ⁴ Pierre Henrard ⁴ Marwa Jahjah-Hussein ⁴ R. Lefèvre ⁴ L. Li Gioi ⁴ S. Monteil ⁴ V. Niess ⁴ Pascal Perret ⁴ Diego Alejandro Roa Romero ⁴ Krzysztof Grzegorz Sobczak ⁴ S. Barsuk ⁵ O. Callot ⁵ B. d'Almagne ⁵ J. He ⁵ B. Jean-Marie ⁵ J. Lefrançois ⁵ F. Machefert ⁵ A. Martin Sanchez ⁵ Marie Nicol ⁵ P. Robbe ⁵ M.-H. Schune ⁵ B. Viaud ⁵ I. Videau ⁵ C. Adrover ⁶ E. Aslanides ⁶ J. Cogan ⁶ B. Khanji ⁶ R. Le Gac ⁶ O. Leroy ⁶ G. Mancinelli ⁶ E. Maurice ⁶ M. Perrin-Terrin ⁶ M. Sapunov ⁶ J. Serrano ⁶ A. Tsaregorodtsev ⁶

1 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

2 LAPP - Laboratoire d'Annecy de Physique des Particules

3 LUPM - Laboratoire Univers et Particules de Montpellier

4 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

5 LAL - Laboratoire de l'Accélérateur Linéaire

6 CPPM - Centre de Physique des Particules de Marseille

Abstract : The first observation of the decay $\bar{B}^0_s \to D^0 K^{*0}$ using $pp$ data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb$^{-1}$, is reported. A signal of $34.4 \pm 6.8$ events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The $\bar{B}^0_s \to D^0 K^{*0}$ branching fraction is measured relative to that of $\bar{B}^0 \to D^0 \rho^0$: $\frac{{\cal B}(\bar{B}^0_s \to D^0 K^{*0})}{{\cal B}(\bar{B}^0 \to D^0 \rho^0)} = 1.48 \pm 0.34 \pm 0.15 \pm 0.12$, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the $B^0$ and $B^0_s$ hadronisation fractions.

Document type :

Journal articles

Domain :

Physics [physics] / High Energy Physics - Experiment [hep-ex]

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http://hal.in2p3.fr/in2p3-00637871
Contributor : Swarna Bassava <>
Submitted on : Friday, November 4, 2011 - 9:08:43 AM
Last modification on : Wednesday, September 16, 2020 - 4:21:00 PM

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

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

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