1211.2277 (Jian-Rong Zhang)

Study $X_{c}(3250)$ as a $D_{0}^{*}(2400)N$ molecular state    [PDF]

Jian-Rong Zhang

We present a QCD sum rule analysis for the the newly observed resonance $X_{c}(3250)$ by assuming it as a $D_{0}^{*}(2400)N$ molecular state. Technically, contributions of operators up to dimension 12 are included in the operator product expansion (OPE). The numerical result is $3.18\pm0.51 {GeV}$ for the $D_{0}^{*}(2400)N$ molecular state, which is in agreement with the experimental data of $X_{c}(3250)$. This supports the statement that $X_{c}(3250)$ could be a $D_{0}^{*}(2400)N$ molecular state. The mass for the bottom counterpart $B_{0}^{*}N$ state is predicted to be $6.50\pm0.49 {GeV}$.

View original: http://arxiv.org/abs/1211.2277