Charmonium and Meson-Molecule Hybrid Tetraquarks

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) Issue Title: Special Issue: Fifth Asia-Pacific Conference on Few-Body Problems in Physics, Seoul 2011 In the X (3872) decay, both of the ... and ... branching fractions are observed experimentally, and their sizes are comparable to each other. In order to clarify the mechanism to cause such a large isospin violation, we investigate X(3872) employing a model of coupled-channel two-meson scattering with a ... core. The two-meson states consist of ... , D ^sup +^ D ^sup *-^, ... , and ... . The effects of the [rho] and [omega] meson width are also taken into account. We calculate the transfer strength from the ... core to the final two-meson states. It is found that very narrow ... and ... peaks appear very close to the ... threshold for a wide range of variation in the parameter sets. The size of the ... peak is almost the same as that of ... , which is consistent with the experiments. The large width of the [rho] meson makes the originally small isospin violation by about five times larger.[PUBLICATION ABSTRACT]