First observation of the decay ${\chi }_{cJ}\to {\Sigma }^{+}\bar{p}{K}_S^0+c.c.(J=0,1,2)$

Abstract

Using E1 radiative transitions $\psi (3686)\to \gamma {\chi }_{cJ}$ from a sample of $(448.1\pm 2.9)\times 10^6$ $\psi (3686)$ events collected with the BESIII detector, the decays ${\chi }_{cJ}\to {\Sigma }^{+}\bar{p}{K}_S^0+c.c.(J=0,1,2)$ are studied. The decay branching fractions are measured to be $\mathcal{B}({\chi }_{c0}\to {\Sigma }^{+}\bar{p}{K}_S^0+c.c.)=(3.52\pm 0.19\pm 0.21)\times 10^{-4}$, $\mathcal{B}({\chi }_{c1}\to {\Sigma }^{+}\bar{p}{K}_S^0+c.c.)=(1.53\pm 0.10\pm 0.08)\times 10^{-4}$, and $\mathcal{B}({\chi }_{c2}\to {\Sigma }^{+}\bar{p}{K}_S^0+c.c.)=(8.25\pm 0.83\pm 0.49)\times 10^{-5}$, where the first and second uncertainties are the statistical and systematic ones, respectively. No evident intermediate resonances are observed in the studied processes.

References in corpus (2)

• Measurements of Baryon Pair Decays of ${\chi }_{cJ}$ Mesons
• Observation of $\psi (3686)\to p\bar{p}{\eta }^{\prime }$ and improved measurement of $J/\psi \to p\bar{p}{\eta }^{\prime }$

Cited by in corpus (2)

• Euclid preparation: IX. EuclidEmulator2 -- Power spectrum emulation with massive neutrinos and self-consistent dark energy perturbations
• Observation of the decays ${\chi }_{cJ}\to {\Sigma }^0\bar{p}{K}^{+}+c.c.(J=0,1,2)$