Observation of the decays ${\chi }_{cJ}\to n{K}_S^0\bar{\Lambda }+c.c.$

Abstract

By analyzing $4.48\times 10^8$ $\psi (3686)$ events collected with the BESIII detector, we observe the decays ${\chi }_{cJ}\to n{K}_S^0\bar{\Lambda }+c.c.$ ($J=0$, 1, 2) for the first time, via the radiative transition $\psi (3686)\to \gamma {\chi }_{cJ}$. The branching fractions are determined to be $(6.67\pm 0.26_{\mathrm{stat}}\pm 0.41_{\mathrm{syst}})\times 10^{-4}$, $(1.71\pm 0.12_{\mathrm{stat}}\pm 0.12_{\mathrm{syst}})\times 10^{-4}$, and $(3.66\pm 0.17_{\mathrm{stat}}\pm 0.23_{\mathrm{syst}})\times 10^{-4}$ for $J=0$, 1, and 2, respectively.

arXiv comment10 pages, 4 figures

References in corpus (12)

• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Experimental constraints on the spin and parity of the Z(4430)+
• TopoAna: A generic tool for the event type analysis of inclusive Monte-Carlo samples in high energy physics experiments
• A New State of Baryonium
• Antiproton-Proton Channels in J/psi Decays
• Model-independent view on the low-mass proton-antiproton enhancement
• ppbar enhancement in B and J/Psi decay
• Colour Octet Contribution in Exclusive P-Wave Charmonium Decay into Octet and Decuplet Baryons
• Baryonium with a phenomenological skyrmion-type potential
• Measurement of B(J/psi->eta_c gamma) at KEDR
• Covariant Helicity-Coupling Amplitudes: A New Formulation
• Coherent helicity amplitude for sequential decays

Cited by in corpus (2)

• Measurement of the integrated luminosity of the data collected at 3.773 GeV by BESIII from 2021 to 2024
• Study of the decays ${\chi }_{cJ}\to \Lambda \bar{\Lambda }\varphi$