Search for ?(1S,2S)?Zc+Zc(?)? and e+e??Zc+Zc(?)? at s=10.52 , 10.58, and 10.867 GeV

Abstract

The first search for double charged charmoniumlike state production in �?(1S) and �?(2S) decays and in e+e- annihilation at s=10.52, 10.58, and 10.867 GeV is conducted using data collected with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant signals are observed in any of the studied modes, and the 90% credibility level upper limits on their product branching fractions in �?(1S) and �?(2S) decays [B(�?(1S,2S)?Zc+Zc(?)-)�B(Zc+??++cc) (cc=J/?, ?c1(1P), ?(2S))] and the product of Born cross section and branching fraction for e+e-?Zc+Zc(?)- (?(e+e-?Zc+Zc(?)-)�B(Zc+??++cc)) at s=10.52, 10.58, and 10.867 GeV are determined. Here, Zc refers to the Zc(3900) and Zc(4200) observed in the ?J/? final state, the Zc1(4050) and Zc2(4250) in the ??c1(1P) final state, and the Zc(4050) and Zc(4430) in the ??(2S) final state. � 2018 American Physical Society.