Observation of the decay $B_s^0\to {\eta }_c\varphi$ and evidence for $B_s^0\to {\eta }_c{\pi }^{+}{\pi }^{-}$

Abstract

A study of $B_s^0\to {\eta }_c\varphi$ and $B_s^0\to {\eta }_c{\pi }^{+}{\pi }^{-}$ decays is performed using $pp$ collision data corresponding to an integrated luminosity of 3.0$\mathrm{f}{\mathrm{b}}^{-1}$, collected with the LHCb detector in Run~1 of the LHC. The observation of the decay $B_s^0\to {\eta }_c\varphi$ is reported, where the ${\eta }_c$ meson is reconstructed in the $p\bar{p}$, $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$, ${\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ and $K^{+}{K}^{-}{K}^{+}{K}^{-}$ decay modes and the $\varphi (1020)$ in the $K^{+}{K}^{-}$ decay mode. The decay $B_s^0\to J/\psi \varphi$ is used as a normalisation channel. Evidence is also reported for the decay $B_s^0\to {\eta }_c{\pi }^{+}{\pi }^{-}$, where the ${\eta }_c$ meson is reconstructed in the $p\bar{p}$ decay mode, using the decay $B_s^0\to J/\psi {\pi }^{+}{\pi }^{-}$ as a normalisation channel. The measured branching fractions are \begin{eqnarray*} {\mathcal B (B^{0}_{s} \to η_{c} ϕ)} &=& \left(5.01 \pm 0.53 \pm 0.27 \pm 0.63 \right) \times 10^{-4} \,, \nonumber \\ {\mathcal B (B^{0}_{s} \to η_{c} π^+ π^-)} &=& \left(1.76 \pm 0.59 \pm 0.12 \pm 0.29 \right) \times 10^{-4} \,, \end{eqnarray*} where in each case the first uncertainty is statistical, the second systematic and the third uncertainty is due to the limited knowledge of the external branching fractions.

arXiv comment30 pages, 9 figures All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-056.html

References in corpus (27)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
• LHCb Detector Performance
• PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays
• sPlot: a statistical tool to unfold data distributions
• TMVA - Toolkit for Multivariate Data Analysis
• The LHCb Trigger and its Performance in 2011
• Performance of the LHCb RICH detector at the LHC
• Decay Chain Fitting with a Kalman Filter
• Efficient, reliable and fast high-level triggering using a bonsai boosted decision tree
• The RooFit toolkit for data modeling
• Anatomy and Phenomenology of FCNC and CPV Effects in SUSY Theories
• Mass distributions marginalized over per-event errors
• Precision measurement of $CP$ violation in $B_s^0\to J/\psi K^{+}{K}^{-}$ decays
• 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
• The MFV limit of the MSSM for low tan(beta): meson mixings revisited
• Measurement of the CP-violating weak phase phi[s] and the decay width difference Delta Gamma[s] using the Bs to J/Psi phi(1020) decay channel in pp collisions at sqrt(s) = 8 TeV
• sFit: a method for background subtraction in maximum likelihood fit
• Measurement of the CP-Violating Phase beta_s in B0s -> J/Psi Phi Decays with the CDF II Detector
• Measurement of the CP-violating phase ${\varphi }_s$ in ${\bar{B}}_s^0\to D_s^{+}{D}_s^{-}$ decays
• First study of the CP-violating phase and decay-width difference in $B_s^0\to \psi (2S)\varphi$ decays
• New Physics in Bs -> J/psi phi: a General Analysis
• Measurement of the CP-violating phase ${\varphi }_s$ and the $B_s^0$ meson decay width difference with $B_s^0\to J/\psi \varphi$ decays in ATLAS
• Flavour Theory: 2009

Cited by in corpus (7)

• Coupled-wire constructions: a Luttinger liquid approach to topology
• Model-Independent Determination of $B_c^{+}\to {\eta }_c{\ell }^{+}\nu$ Form Factors
• Studies of the resonance components in the $B_s$ decays into charmonia plus kaon pair
• Quasi-two-body decays $B\to {\eta }_c(1S,2S)[\rho (770),\rho (1450),\rho (1700)\to ]\pi \pi$ in the perturbative QCD approach
• $B_{(s)}\to {\eta }_c(P,V)$ decays and effects of the next-to-leading order contributions in the perturbative QCD approach
• Identifying Exclusive Displaced Hadronic Signatures in the Forward Region of the LHC
• Determining the effective Wilson coefficient $a_2$ in terms of $BR(B_s\to {\eta }_c\varphi )$ and evaluating $BR(B_s\to {\eta }_c{f}_0(980))$