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Title: First observation and measurement of the branching fraction for the decay B {/s 0} → D {/s ∗} ∓ K ±
Author: Badalov, A.
Casanova Mohr, R.
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Diaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, E.
Rives Molina, V.
Ruiz, Hugo
LHCb collaboration
Keywords: Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Large Hadron Collider (France and Switzerland)
Particle physics
Issue Date: 18-Jun-2015
Publisher: Springer Verlag
Abstract: The first observation of the B0 s → D∗∓ s K± decay is reported using 3.0 fb−1 of protonproton collision data collected by the LHCb experiment. The D∗∓ s mesons are reconstructed through the decay chain D∗∓ s → γD∓ s (K∓K±π ∓). The branching fraction relative to that for B0 s → D∗− s π + decays is measured to be B(B0 s→ D∗∓ s K±)/B(B0 s→ D∗− s π +) = 0.068 ± 0.005+0.003 −0.002, where the first uncertainty is statistical and the second is systematic. Using a recent measurement of B(B0 s → D∗− s π +), the absolute branching fraction of B0 s → D∗∓ s K± is measured as B(B0 s → D∗∓ s K±) = ( 16.3 ± 1.2 (stat) +0.7 −0.5 (syst) ± 4.8 (norm) ) × 10−5 , where the third uncertainty is due to the uncertainty on the branching fraction of the normalisation channel.
Note: Reproducció del document publicat a:
It is part of: Journal of High Energy Physics, 2015, vol. 2015, num. 130, p. 1-18
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ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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