Observation of ${\chi }_{cJ}\to 4K_S^0$

Abstract

By analyzing $(448.1\pm 2.9)\times 10^6$ $\psi (3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays of ${\chi }_{cJ}\to 4K_S^0$ ($J=0,1,2$) are observed for the first time with statistical significances of 26.5$\sigma$, 5.9$\sigma$ and 11.4$\sigma$, respectively. The product branching fractions of $\psi (3686)\to \gamma {\chi }_{cJ}$, ${\chi }_{cJ}\to 4K_S^0$ are presented and the branching fractions of ${\chi }_{cJ}\to 4K_S^0$ decays are determined to be ${\mathcal{B}}_{{\chi }_{c0}\to 4K_S^0}$=$(5.76\pm 0.34\pm 0.38)$$\times 10^{-4}$, ${\mathcal{B}}_{{\chi }_{c1}\to 4K_S^0}$=$(0.35\pm 0.09\pm 0.03)$$\times 10^{-4}$ and ${\mathcal{B}}_{{\chi }_{c2}\to 4K_S^0}$=$(1.14\pm 0.15\pm 0.08)$$\times 10^{-4}$, where the first uncertainties are statistical and the second are systematic, respectively.

References in corpus (12)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Design and Construction of the BESIII Detector
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Determination of the number of $\psi (3686)$ events at BESIII
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• Colour Octet Contribution in Exclusive P-Wave Charmonium Decay into Octet and Decuplet Baryons
• Further study of the helicity selection rule evading mechanism in ${\eta }_c$, ${\chi }_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs
• Study of charmonia in four-meson final states produced in two-photon collisions
• Colour-octet NLO QCD corrections to hadronic ${\chi }_J$ decays
• Measurement of ${\chi }_{cJ}$ decaying into $p\bar{n}{\pi }^{-}$ and $p\bar{n}{\pi }^{-}{\pi }^0$
• First observations of $\psi (2S)$ and ${\chi }_{cJ}(1P)$ decays to four-body final states $h^{+}{h}^{-}{K}_S^0{K}_S^0$

Cited by in corpus (1)

• Search for hidden-charm tetraquark with strangeness in $e^{+}{e}^{-}\to K^{+}{D}_s^{\ast -}{D}^{\ast 0}+c.c.$