Observation of the $B_s^0\to J/\psi K_{\mathrm{S}}^0{K}^{\pm }{\pi }^{\mp }$ decay

Abstract

Decays of the form $B_{(s)}^0\to J/\psi K_{\mathrm{S}}^0{h}^{+}{h}^{\left(\prime \right)-}$ ($h^{(\prime )}=K,\pi$) are searched for in proton-proton collision data corresponding to an integrated luminosity of $1.0{\mathrm{fb}}^{-1}$ recorded with the LHCb detector. The first observation of the $B_s^0\to J/\psi K_{\mathrm{S}}^0{K}^{\pm }{\pi }^{\mp }$ decay is reported, with significance in excess of 10 standard deviations. The $B^0\to J/\psi K_{\mathrm{S}}^0{K}^{+}{K}^{-}$ decay is also observed for the first time. The branching fraction of $B^0\to J/\psi K_{\mathrm{S}}^0{\pi }^{+}{\pi }^{-}$ is determined, to significantly better precision than previous measurements, using $B^0\to J/\psi K_{\mathrm{S}}^0$ as a normalisation channel. Branching fractions and upper limits of the other $B_{(s)}^0\to J/\psi K_{\mathrm{S}}^0{h}^{+}{h}^{\left(\prime \right)-}$ modes are determined relative to that of the $B^0\to J/\psi K_{\mathrm{S}}^0{\pi }^{+}{\pi }^{-}$ decay.

arXiv comment24 pages, 12 figures; v2 as published

References in corpus (45)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• The LHCb Trigger and its Performance in 2011
• Performance of the LHCb RICH detector at the LHC
• Kernel Estimation in High-Energy Physics
• Study of the B- --> J/psi K- pi+ pi- Decay and Measurement of the B- --> X(3872) K- Branching Fraction
• Decay Chain Fitting with a Kalman Filter
• Determination of the X(3872) meson quantum numbers
• Differential branching fractions and isospin asymmetries of $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ decays
• Evidence for a Narrow Near-Threshold Structure in the $J/\psi \varphi$ Mass Spectrum in $B^{+}\to J/\psi \varphi K^{+}$ Decays
• Performance of the LHCb Outer Tracker
• Implications of LHCb measurements and future prospects
• Performance of the LHCb muon system
• Branching Ratio Measurements of $B_s$ Decays
• Measurement of b hadron production fractions in 7 TeV pp collisions
• Bounds on the width, mass difference and other properties of X(3872) --> pi+pi-J/psi decays
• Measurement of the fragmentation fraction ratio $f_s/f_d$ and its dependence on $B$ meson kinematics
• Observation of a peaking structure in the J/psi phi mass spectrum from B(+/-) to J/psi phi K(+/-) decays
• Measurement of CP violation and the B_s^0 meson decay width difference with B_s^0\to J/ψK^+ K^- and B_s^0\to J/ψπ^+π^- decays
• Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi
• Measurement of the CP-violating phase ${\varphi }_s^{J/\psi \varphi }$ using the flavor-tagged decay $B_s^0\to J/\psi \varphi$ in 8 fb${}^{-1}$ of $p \barp$ collisions
• Search for the X(4140) state in B+->J/psi phi K+ decays with the D0 detector
• Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set
• Measurement of the CP-violating phase ${\varphi }_s$ in ${\overline{B}}_s^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays
• Search for the X(4140) state in B+ to J/psi phi K+ decays
• Use of B->J/ψf0 decays to discern the q anti-q or tetraquark nature of scalar mesons
• Anatomy of $B_{s,d}^0\to J/\psi f_0(980)$
• Effective Lifetimes of $B_s$ Decays and their Constraints on the $B_s^0$-${\bar{B}}_s^0$ Mixing Parameters
• Precision measurement of the ratio of the ${\Lambda }_b^0$ to ${\overline{B}}^0$ lifetimes
• Time-dependent angular analysis of the decay Bs -> J/psi phi and extraction of Delta Gamma_s and the CP-violating weak phase phi_s by ATLAS
• Exploring CP Violation and $\eta$-${\eta }^{\prime }$ Mixing with the $B_{s,d}^0\to J/\psi {\eta }^{(\prime )}$ Systems
• Searches for ${\Lambda }_b^0$ and ${\Xi }_b^0$ decays to $K_{\mathrm{S}}^{0}p{\pi }^{-}$ and $K_{\mathrm{S}}^{0}p{K}^{-}$ final states with first observation of the ${\Lambda }_b^0\to K_{\mathrm{S}}^{0}p{\pi }^{-}$ decay
• Observation of B^0_(s) -> J/ψf_1(1285) decays and measurement of the f_1(1285) mixing angle
• First measurement of the CP-violating phase in $B_s^0\to \varphi \varphi$ decays
• Measurement of the CP violating phase ϕ_s in Bs->J/ψf0(980)
• Rare B Decays into States Containing a J/psi Meson and a Meson with ssbar Quark Content
• Observation of B->J/psi K1(1270)
• Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays
• Measurement of the effective B_s^0 -> J/ψ K_S^0 lifetime
• First Observation of the Decay $B\to J/\psi \varphi K$
• A Study of B0 -> J/psi K(*)0 pi+ pi- Decays with the Collider Detector at Fermilab

Cited by in corpus (5)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Precise measurement of the $f_s/f_d$ ratio of fragmentation fractions and of $B_s^0$ decay branching fractions
• Observation of $B_s^0\to K^{\ast \pm }{K}^{\mp }$ and evidence for $B_s^0\to K^{\ast -}{\pi }^{+}$ decays
• Theoretical study in the ${\bar{B}}^0\to J/\psi {\bar{K}}^{\ast 0}{K}^0$ and ${\bar{B}}^0\to J/\psi f_1(1285)$ decays