First observation of the decay B0s → D0K*0 and a measurement of the ratio of branching fractions B (B0s → D0K*0) / B (B0s → D0ρ0

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-58429

LHCb Collaboration, including the following authors; Anderson, J; Bernet, R; Büchler-Germann, A; Bursche, A; Chiapolini, N; De Cian, M; Elsasser, C; Müller, K; Palacios, J; Salzmann, C; Steinkamp, O; Straumann, U; Vollhardt, A (2011). First observation of the decay B0s → D0K*0 and a measurement of the ratio of branching fractions B (B0s → D0K*0) / B (B0s → D0ρ0. Physics Letters B, 706(1):32-39.

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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.

Other titles:	First observation of the decay $\bar{B}^0_s \to D^0 K^{0}$ and a measurement of the ratio of branching fractions $\frac{{\cal B}(\bar{B}^0_s \to D^0 K^{0})}{{\cal B}(\bar{B}^0 \to D^0 ρ^0)}$
Item Type:	Journal Article, refereed, original work
Communities & Collections:	07 Faculty of Science > Physics Institute
DDC:	530 Physics
Language:	English
Date:	2011
Deposited On:	14 Feb 2012 13:59
Last Modified:	19 Jun 2013 14:19
Publisher:	Elsevier
ISSN:	0370-2693 (P) 1873-2445 (E)
Publisher DOI:	10.1016/j.physletb.2011.10.073
Related URLs:	http://arxiv.org/abs/1110.3676

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