Using a dataset of (27.12 +/- 0.14) x 10(8) psi(3686) events collected by the BESIII detector operating at the BEPCII collider, we report the first observation of the decay psi(3686) -> Sigma(0)(Sigma) over bar (0)omega. with a statistical significance of 8.9 sigma. The measured branching fraction is (1.24 +/- 0.16(stat +/-) 0.11(sys)) x 10(-5), where the first uncertainty is statistical and the second is systematic. Additionally, we investigate potential intermediate states in the invariant mass distributions of Sigma(0) omega, (Sigma) over bar (0)omega. and Sigma(0)(Sigma) over bar (0)omega. A hint of a resonance is observed in the invariant mass distribution of M-Sigma 0 (Sigma) over bar0 omega, located around 2.06 GeV/c(2), with a significance of 2.5 sigma.
Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Lesya Shchutska, Elena Graverini, Sebastian Schulte, Donal Patrick Hill, Marie Theres Christin Bachmayer, Serhii Cholak, Ettore Zaffaroni, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi, Elisabeth Maria Niel, Federico Ronchetti, Radoslav Marchevski, Anni Matilda Kauniskangas, Dimitrios Kaminaris, Raphaël van Laak, Pierre Paul Louis Mayencourt, Brianna Leililani Thielen, Arnaud Merlin Gauthey, Gianluca Zunica, Abdul-Kerim Guseinov, Esteban Curras Rivera, Yifei Song, Roberto Ribatti, Alexandre Brea Rodriguez, Rita De Sousa Ataíde Da Silva, Xiafei Chang