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Weihong Liang

Publications and source records attributed to Weihong Liang.

4 recordsLinked to original sources
arXiv2014

A discussion of deuteron transverse charge densities

The deuteron transverse charge density $ρ_C(b)$ is the two-dimensional Fourier transform of its charge form factor in the impact space. We show that different parameterizations of the charge form factors provide different $ρ_C(b)$, in particular at the central value of impact parameter ($b=0$), although all the parameterizations can well reproduce the form factors in the region of small $Q^2$. In addition, we also check the explicit contributions from the different coordinate intervals of the deuteron wave function to its root-mean-square radius.

hep-ph↗
arXiv2013

A study of $ηK \bar K$ and $η' K \bar K$ with the fixed center approximation to Faddeev equations

In the present work we investigate the three-body systems of $ηK \bar K$ and $η' K \bar K$, by taking the fixed center approximation to Faddeev equations. We find a clear and stable resonance structure around 1490 MeV in the squared $ηK \bar K$ scattering amplitude, which is not sensitive to the renormalization parameters. Conversely, we get only an enhancement effect of the threshold in the $η' K \bar K$ amplitude that indicates the difficulty to bind the $η' K \bar K$ system as a consequence of a weaker $η' K$ interaction than the $ηK$ one. We associate the $ηK \bar K$ state found to the $η(1475)$.

hep-ph↗
arXiv2013

Searching for a hidden charm $h_1$ state in the $X(4660) \to ηh_1$ and $X(4660) \to ηD^* \bar D^*$ decays

We explore the possibility of experimentally detecting a predicted $h_1 ~[I^G(J^{PC})=0^-(1^{+-})]$ state of hidden charm made out from the $D^* \bar D^*$ interaction. The method consists in measuring the decay of X(4660) into $ηD^* \bar D^*$, determining the binding energy with respect to the $D^* \bar D^*$ threshold from the shape of the $D^* \bar D^*$ invariant mass distribution. A complementary method consists in looking at the inclusive $X(4660) \to ηX$ decay, searching for a peak in the $X$ invariant mass distribution given by the missing X(4660), $η$ mass. We make calculations to determine the partial decay width of $X(4660) \to ηh_1$ from the measured $X(4660) \to ηD^* \bar D^*$ distribution. This estimation should serve in an experiment to foresee the possibility of detecting the $h_1$ state on top of the background of inclusive events.

hep-ph↗