Study of charmonium decays to $K_S^{0}K\pi$ in the $B\to (K_S^{0}K\pi )K$ channels

Abstract

A study of the $B^{+}\to K_S^0{K}^{+}{K}^{-}{\pi }^{+}$ and $B^{+}\to K_S^0{K}^{+}{K}^{+}{\pi }^{-}$ decays is performed using proton-proton collisions at center-of-mass energies of 7, 8 and 13 TeV at the LHCb experiment. The $K_S^{0}K\pi$ invariant mass spectra from both decay modes reveal a rich content of charmonium resonances. New precise measurements of the ${\eta }_c$ and ${\eta }_c(2S)$ resonance parameters are performed and branching fraction measurements are obtained for $B^{+}$ decays to ${\eta }_c$, $J/\psi$, ${\eta }_c(2S)$ and ${\chi }_{c1}$ resonances. In particular, the first observation and branching fraction measurement of $B^{+}\to {\chi }_{c0}{K}^0{\pi }^{+}$ is reported as well as first measurements of the $B^{+}\to K^0{K}^{+}{K}^{-}{\pi }^{+}$ and $B^{+}\to K^0{K}^{+}{K}^{+}{\pi }^{-}$ branching fractions. Dalitz plot analyses of ${\eta }_c\to K_S^{0}K\pi$ and ${\eta }_c(2S)\to K_S^{0}K\pi$ decays are performed. A new measurement of the amplitude and phase of the $K\pi$ $S$-wave as functions of the $K\pi$ mass is performed, together with measurements of the $K_0^{\ast }(1430)$, $K_0^{\ast }(1950)$ and $a_0(1700)$ parameters. Finally, the branching fractions of ${\chi }_{c1}$ decays to $K^{\ast }$ resonances are also measured.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-051.html (LHCb public pages)

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Cited by in corpus (8)

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• Study of light-meson resonances decaying to $K_{\mathrm{S}}^{0}K\pi$ in the $B\to (K_{\mathrm{S}}^{0}K\pi )K$ channels
• Study of ${\chi }_{b1,2}(2P)\to \omega {\rm Y}(1S)$ transitions in ${\rm Y}(3S)\to \gamma {\chi }_{b1,2}(2P)$ decays at BaBar
• Roles of $a_0(980)$ and $a_0(1710)$ in Cabibbo-suppressed process $D^{+}\to {\pi }^0{\pi }^{+}\eta$
• Study the decays of ${\chi }_{cJ}(J=0,1,2)$ to light meson pairs with SU(3) flavor symmetry/breaking analysis
• Role of $a_0(1710)$ in the $J/\psi \to {\rho }^{+}{\rho }^{-}\omega$ and $J/\psi \to \gamma {\rho }^0\omega$ reactions
• Search for the decays $X(3872)\to K_S^0{K}^{\pm }{\pi }^{\mp }$ and $K^{\ast }(892)\bar{K}$ at BESIII