Bottomed Analog of Z+(4433)

Abstract

The newly observed $Z^{+}(4433)$ resonance by BELLE is believed to be a tetraquark bound state made up of $(cu)(\bar{c}\bar{d})$. We propose the bottomed analog of this bound state, namely, by replacing one of the charm quarks by a bottom quark, thus forming $Z_{bc}^{0,\pm ,\pm \pm }$. One of the $Z_{bc}$ is doubly charged. The predicted mass of $Z_{bc}$ is around 7.6 GeV. This doubly-charged bound state can be detected by its decay into $B_c^{\pm }{\pi }^{\pm }$. Similarly, we can also replace both charm quark and antiquark of the $Z^{+}(4433)$ by bottom quark and antiquark, respectively, thus forming $Z_{bb}$ the bottomonium analog of $Z^{+}(4433)$. The predicted mass of $Z_{bb}$ is about 10.7 GeV.

Comments: 5 pages