First observation of the decays ${\bar{B}}_{(s)}^0\to D_s^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ and ${\bar{B}}_s^0\to D_{s1}(2536{)}^{+}{\pi }^{-}$

Abstract

The first observation of the decays ${\bar{B}}_s^0\to D_s^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ and ${\bar{B}}^0\to D_s^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ are reported using an integrated luminosity of 1.0 fb${}^{-1}$ recorded by the LHCb experiment. The branching fractions, normalized with respect to ${\bar{B}}_s^0\to D_s^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ and ${\bar{B}}_s^0\to D_s^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$, respectively, are measured to be {\br(\bar{B}^0_{s}\to D_s^+K^-π^+π^-)\over\br(\bar{B}^0_{s}\to D_s^+π^-π^+π^-)} &= (5.2\pm0.5\pm0.3)\times10^{-2}, {\br(\bar{B}^0\to D_s^+K^-π^+π^-)\over\br(\bar{B}^0_{s}\to D_s^+K^-^π^+π^-)} &= 0.54\pm0.07\pm0.07, where the first uncertainty is statistical and the second is systematic. The ${\bar{B}}_s^0\to D_s^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ decay is of particular interest as it can be used to measure the weak phase $\gamma$. First observation of the ${\bar{B}}_s^0\to D_{s1}(2536{)}^{+}{\pi }^{-},D_{s1}^{+}\to D_s^{+}{\pi }^{-}{\pi }^{+}$ decay is also presented, and its branching fraction relative to ${\bar{B}}_s^0\to D_s^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ is found to be {\br(\bar{B}^0_s\to D_{s1}(2536)^+π^-, D_{s1}^+\to D_s^+π^-π^+)\over\br(\bar{B}^0_{s}\to D_s^+π^-π^+π^-)} &= (4.0\pm1.0\pm0.4)\times10^{-3}.

arXiv comment17 pages, 7 figures

References in corpus (13)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays
• sPlot: a statistical tool to unfold data distributions
• Boosted Decision Trees as an Alternative to Artificial Neural Networks for Particle Identification
• Enhanced CP Violation with $B\to K{D}^0({\overline{D}}^0)$ Modes and Extraction of the CKM Angle gamma
• Decay Chain Fitting with a Kalman Filter
• Determining $\gamma$ using $B^{\pm }\to D{K}^{\pm }$ with multibody D decays
• Measurement of b hadron production fractions in 7 TeV pp collisions
• Bs-Bs.bar Mixing, CP Violation and Extraction of CKM Phases from Untagged Bs Data Samples
• New Strategies to Obtain Insights into CP Violation Through $B_s\to D_s^{\pm }{K}^{\mp },D_s^{\ast \pm }{K}^{\mp },...$ and $B_d\to D^{\pm }{\pi }^{\mp },D^{\ast \pm }{\pi }^{\mp },...$ Decays
• Measurements of the Branching fractions for $B_{(}s)->D_{(}s)\pi \pi \pi$ and ${\Lambda }_b^0->{\Lambda }_c^{+}\pi \pi \pi$
• Enhancement of CP Violation in B^+- to K_i^+- D^0 By Resonant Effects

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