1204.6390 (Jun He et al.)

New structure around 3250 MeV in the baryonic B decay and the
$D^*_0(2400)N$ molecular hadron    [PDF]

Jun He, Dian-Yong Chen, Xiang Liu

In this work, we first propose the isovector $nD^{*}_0(2400)^0$ molecular state to explain the newly observed enhancement structure around 3250 MeV ($X_c(3250)^0$) in the $\Sigma_c^{++}\pi^-\pi^-$ invariant mass spectrum by the BaBar Collaboration. Under this molecular state configuration, both the analysis of the mass spectrum and the study of its dominant decay channel can depict the resonance parameters measured by BaBar well. Our investigation also shows that the isovector $nD^{*}_0(2400)^0$ molecular state can decay into $\Sigma_c^{++}\pi^-\pi^-$, which is consistent with the experimental observation. These studies provide the direct support to the isovector $nD^{*}_0(2400)^0$ molecular state assignment to $X_c(3250)^0$. In addition, we also predict the isoscalar parter of $X_c(3250)^0$. We suggest future experiment to carry out the search for $Y_c(3250)^+$ by the baryonic B decay $B^+\to \Sigma_c^+\bar{p}\pi^+\pi^-$, which can be as the crucial test of the molecular state picture proposed here.

View original: http://arxiv.org/abs/1204.6390