1304.1850 (Chun-Yu Cui et al.)

Could $Z_{c}(3900)$ be a $I^{G}J^{P}=1^{+}1^{+}$ $D^{*}\bar{D}$
molecular state?    [PDF]

Chun-Yu Cui, Yong-Lu Liu, Wen-Bo Chen, Ming-Qiu Huang

The recently observed narrow resonance $Z_{c}(3900)$ is examined with the assumptions as a $D^{*}\bar{D}$ molecular state with quantum numbers $I^{G}J^{P}=1^{+}1^{+}$. Using QCD sum rules (QCDSR), we consider contributions up to dimension six in the operator product expansion (OPE) at the leading order in $\alpha_{s}$. The mass is obtained as $(3.91 \pm 0.19) {GeV}$ which coincide with the $Z_{c}(3900)$.

View original: http://arxiv.org/abs/1304.1850