English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this article, we calculate the form factors and the coupling constant ofthe vertex $D_{s}^{*}D_{s}\phi$ using the three-point QCD sum rules. Weconsider the contributions of the vacuum condensates up to dimension $7$ in theoperator product expansion(OPE). And all possible off-shell cases areconsidered, $\phi$, $D_{s}$ and $D_{s}^{*}$, resulting in three different formfactors. Then we fit the form factors into analytical functions and extrapolatethem into time-like regions, which giving the coupling constant for theprocess. Our analysis indicates that the coupling constant for this vertex is$G_{Ds*Ds\phi}=4.12\pm0.70 GeV^{-1}$. The results of this work are very usefulin the other phenomenological analysis. As an application, we calculate thecoupling constant for the decay channel $D_{s}^{*}\rightarrow D_{s}\gamma$ andanalyze the width of this decay with the assumption of the vector mesondominance of the intermediate $\phi(1020)$. Our final result about the decaywidth of this decay channel is $\Gamma=0.59\pm0.15keV$.

Analysis of the strong coupling constant $G_{D_{s}^{*}D_{s}\phi}$ and the decay width of $D_{s}^{*}\rightarrow D_{s}\gamma$ with QCD sum rules

Analysis of the strong coupling constant $G_{D_{s}^{}D_{s}\phi}$ and the decay width of $D_{s}^{}\rightarrow D_{s}\gamma$ with QCD sum rules