Observation of χ_{cJ} decaying into the p\bar{p}K^{+}K^{-} final state

Abstract

First measurements of the decays of the three ${\chi }_{cJ}$ states to $p\bar{p}{K}^{+}{K}^{-}$ final states are presented. Intermediate $\varphi \to K^{+}{K}^{-}$ and $\Lambda (1520)\to p{K}^{-}$ resonance states are observed, and branching fractions for ${\chi }_{cJ}\to \bar{p}{K}^{+}\Lambda (1520)$, $\Lambda (1520)\bar{\Lambda }(1520)$, and $\varphi p\bar{p}$ are reported. We also measure branching fractions for direct ${\chi }_{cJ}\to p\bar{p}{K}^{+}{K}^{-}$ decays. These are first observations of ${\chi }_{cJ}$ decays to unstable baryon resonances and provide useful information about the ${\chi }_{cJ}$ states. The experiment uses samples of ${\chi }_{cJ}$ mesons produced via radiative transitions from 106 million ${\psi }^{\prime }$ mesons collected in the BESIII detector at the BEPCII $e^{+}{e}^{-}$ collider.

16 pages, 5 figures

Cited by in corpus (8)

• Phenomenological NLO analysis of eta(c) production at the LHC in the collider and fixed-target modes
• $pp\to pp{\eta }^{\prime }$ reaction at high energies
• $pp\to pp{K}^{+}{K}^{-}$ reaction at high energies
• Partial wave analysis of $\psi (2S)\to p\bar{p}\eta$
• Enhancement near the $\bar{p}\Lambda$ threshold in the ${\chi }_{c0}\to \bar{p}{K}^{+}\Lambda$ reaction
• Study of charmonium production using decays to hadronic final states with the LHCb experiment
• Helicity amplitude and branching fraction measurement of ${\chi }_{cJ}\to \Lambda \bar{\Lambda }$
• Observation of ${\chi }_{cJ}\to p\bar{p}{K}_S^0{K}^{-}{\pi }^{+}+c.c.$