RT Journal Article
T1 First observation and measurement of the branching fraction for the decay B  0s → D  ∗s ∓ K ±
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Dosil Suárez, Álvaro
A1 Fernández Albor, Víctor Manuel
A1 Gallas Torreira, Abraham Antonio
A1 García Pardiñas, Julián
A1 Hernando Morata, José Ángel
A1 Plo Casasus, Máximo
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Vázquez Regueiro, Pablo
A1 Vázquez Sierra, Carlos
A1 Vieites Díaz, María
K1 Branching fraction
K1 B physics
K1 Flavor physics
K1 Hadron-Hadron Scattering
AB 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 beB(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 asB(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.
PB Springer
SN 1029-8479
YR 2015
FD 2015
LK http://hdl.handle.net/10347/21986
UL http://hdl.handle.net/10347/21986
LA eng
NO 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
DS Minerva
RD 27 abr 2026