1203.0700 (Jian-Rong Zhang et al.)

New molecular candidates: X(2000), X(2200), and X(2350)    [PDF]

Jian-Rong Zhang, Guo-Feng Chen

Assuming the newly observed resonant structures X(2000), X(2200), and X(2350) as $\omega\omega$, $\omega\phi$, and $\phi\phi$ molecular states respectively, we compute their mass values in the framework of QCD sum rules. The numerical results are $1.97\pm0.37 GeV$ for $\omega\omega$, $2.01\pm0.20 GeV$ for $\omega\phi$, and $2.07\pm0.32 GeV$ for $\phi\phi$, which coincide with the experimental values of X(2000), X(2200), and X(2350), respectively. This supports the statement that X(2000), X(2200), and X(2350) could be $\omega\omega$, $\omega\phi$, and $\phi\phi$ molecular candidates, respectively.

View original: http://arxiv.org/abs/1203.0700