2 research outputs found
Ambiversion of X(3872)
An analysis including most recent Belle data on X(3872) is performed, using
coupled channel Flatt\'e formula. A third sheet pole close to but
\textit{below} threshold is found, besides the bound state/virtual
state pole discussed in previous literature. The co-existence of two poles near
the threshold indicates that the X(3872) may be of ordinary state origin, distorted by strong coupled channel effects. The
latter manifests itself as a molecular bound state (or a virtual state).Comment: Slightly revised version accepted for publication in Physics Letter
Analysis of the radiative decays among the charmonium states
In this article, we study the radiative decays among the charmonium states
with the heavy quark effective theory, and make predictions for the ratios
among the radiative decay widths of an special multiplet to another multiplet.
The predictions can be confronted with the experimental data in the future and
put additional constraints in identifying the , , charmonium-like
mesons.Comment: 12 pages, revised revisio