First observation and measurement of the branching fraction for the decay B 0s → D ∗s ∓ K ±
Title: | First observation and measurement of the branching fraction for the decay B 0s → D ∗s ∓ K ±
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Author: | LHCb Collaboration
Adeva Andany, Bernardo
Dosil Suárez, Álvaro
Fernández Albor, Víctor Manuel
Gallas Torreira, Abraham Antonio
García Pardiñas, Julián
Hernando Morata, José Ángel
Plo Casasus, Máximo
Romero Vidal, Antonio
Saborido Silva, Juan José
Sanmartín Sedes, Brais
Santamarina Ríos, Cibrán
Vázquez Regueiro, Pablo
Vázquez Sierra, Carlos
Vieites Díaz, María
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Affiliation: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE)
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Subject: | Branching fraction | B physics | Flavor physics | Hadron-Hadron Scattering | |
Date of Issue: | 2015
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Publisher: | Springer
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Citation: | Aaij, R., Adeva, B., Adinolfi, M. et al. First observation and measurement of the branching fraction for the decay B 0s → D ∗s ∓ K ± . J. High Energ. Phys. 2015, 130 (2015). https://doi.org/10.1007/JHEP06(2015)130
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Abstract: | The first observation of the B 0s → D ∗s ∓ K ± decay is reported using 3.0 fb−1 of proton-proton 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 B 0s → D ∗s − π + decays is measured to be
B(B0s→D∗s∓K±)/B(B0s→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(B0s→D∗s−π+), the absolute branching fraction of B 0s → D ∗s ∓ K ± is measured as
B(B0s→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. |
Publisher version: | https://doi.org/10.1007/JHEP06(2015)130 |
URI: | http://hdl.handle.net/10347/21986
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DOI: | https://doi.org/10.1007/JHEP06(2015)130 |
ISSN: | 1029-8479
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Rights: | © CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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