摘要
As an exotic charmonium-like state, the Z(4430) has attracted a lot of attention after it was found in the ′?invariant mass distribution in B ! ′?K decays by the Belle Collaboration[1]. In 2013, the existence of thischarged Z±(4430) state was confirmed from a full amplitude analysis of the subsequently updated results on theB! ′?K decays by Belle Collaboration[2]. Very recently, the LHCb Collaboration reported the first independentconfirmation of the existence of the charged Z?(4430) with 4D model-dependent amplitude method[3]. In addition,its spin parity (JP ) was measured to be JP =1+. The most possible explanation would be considering the Z(4430)as a tetraquark state. If the charged Z±(4430) is indeed a tetraquark state, then the lightest charged four-quarkstate should be constructed by (c￣cu￣d or c￣cd￣u) quarks.
