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

We deliver an exploratory lattice QCD examination of the $K^\ast(892)$ mesondecay width with the help of the p-wave scattering phase $\delta_1$ ofpion-kaon ($\pi K$) system in the isospin $I=1/2$ channel, which are extractedby the modified Rummukainen-Gottlieb formula for two-particle system witharbitrary mass, and it clearly reveals the entity of a resonance at a massaround $K^\ast(892)$ meson mass. The effective range formula is applied todescribe the energy dependence of the scattering phase and we obtain theeffective $K^\ast \to \pi K$ coupling constant as $g_{K^\ast \pi K} =6.38(78)$, and subsequently achieve the decay width to be $64.9 \pm 8.0$ MeV,which is in reasonable accordance with the current experiment. Our latticeinvestigations are conducted on a $20^3\times48$ MILC full QCD gaugeconfiguration at $(m_\pi + m_K) / m_{K^\ast} \approx 0.739$ and the latticespacing $a \approx 0.15$ fm.

Lattice QCD study on $K^\ast(892)$ meson decay width