Measurement of the branching fraction of the decay $B_s^0\to K_S^0{K}_S^0$

Abstract

A measurement of the branching fraction of the decay $B_s^0\to K_S^0{K}_S^0$ is performed using proton-proton collision data corresponding to an integrated luminosity of 5 $f{b}^{-1}$ collected by the LHCb experiment between 2011 and 2016. The branching fraction is determined to be BR($B_s^0\to K_S^0{K}_S^0$) = [8.3 $\pm$ 1.6 (stat) $\pm$ 0.9 (syst) $\pm$ 0.8 (norm) $\pm$ 0.3 ($f_s/f_d$)] $\times 10^{-6}$ , where the first uncertainty is statistical, the second is systematic, and the third and fourth are due to uncertainties on the branching fraction of the normalization mode $B^0\to \varphi K_S^0$ and the ratio of hadronization fractions $f_s/f_d$. This is the most precise measurement of this branching fraction to date. Furthermore, a measurement of the branching fraction of the decay $B^0\to K_S^0{K}_S^0$ is performed relative to that of the $B_s^0\to K_S^0{K}_S^0$ channel, and is found to be $\frac{BR(B^0\to K_S^0{K}_S^0)}{BR(B_s^0\to K_S^0{K}_S^0)}$ = [7.5 $\pm$ 3.1 (stat) $\pm$ 0.5 (syst) $\pm$ 0.3 ($f_s/f_d$)] $\times 10^{-2}$.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-030.html

References in corpus (11)

• PYTHIA 6.4 Physics and Manual
• Performance of the LHCb Vertex Locator
• Charmless non-leptonic B_s decays to PP, PV and VV final states in the pQCD approach
• Branching Ratio Measurements of $B_s$ Decays
• Sensitivity of searches for new signals and its optimization
• Exploring B_{d,s}-> KK decays through flavour symmetries and QCD-factorisation
• B_s to K^(*)0 \bar K^(*)0 decays: the golden channels for new physics searches
• Observation of the annihilation decay mode $B^0\to K^{+}{K}^{-}$
• $B\to \pi \pi$ decays and effects of the next-to-leading order contributions
• Amplitude analysis of $B_s^0\to K_{\text{S}}^0{K}^{\pm }{\pi }^{\mp }$ decays
• Amplitude analysis of the $B_{(s)}\to K^{\ast 0}{\overline{K}}^{\ast 0}$ decays and measurement of the branching fraction of the $B\to K^{\ast 0}{\overline{K}}^{\ast 0}$ decay

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