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- W1567237653 abstract "We deliver an exploratory lattice QCD examination of the ${K}^{*}(892)$ meson decay width via the $p$-wave scattering phase shift of a pion-kaon ($ensuremath{pi}K$) system in the isospin $I=1/2$ channel. The modified Rummukainen-Gottlieb formula for a two-particle system with arbitrary mass is employed to extract phase shifts, which clearly reveal the existence of a resonance at a mass around the ${K}^{*}(892)$ meson mass. The effective range formula is applied to describe the energy dependence of the phase shift and we extract the effective ${K}^{*}ensuremath{rightarrow}ensuremath{pi}K$ coupling constant as ${g}_{{K}^{*}ensuremath{pi}K}=6.38(78)$. The decay width estimated from the phase shift is about $64.9ifmmodepmelsetextpmfi{}8.0text{ }text{ }mathrm{MeV}$, which is in reasonable accordance with the experiment. Our lattice investigations are conducted on a ${20}^{3}ifmmodetimeselsetexttimesfi{}48$ MILC gauge configuration with the ${N}_{f}=2+1$ flavors of the asqtad-improved staggered dynamical sea quarks at $({m}_{ensuremath{pi}}+{m}_{K})/{m}_{{K}^{*}}ensuremath{approx}0.739$ and lattice spacing $aensuremath{approx}0.15text{ }text{ }mathrm{fm}$." @default.
- W1567237653 created "2016-06-24" @default.
- W1567237653 creator A5016063831 @default.
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- W1567237653 date "2012-11-07" @default.
- W1567237653 modified "2023-10-14" @default.
- W1567237653 title "Lattice QCD study of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msup><mml:mi>K</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:mo stretchy=false>(</mml:mo><mml:mn>892</mml:mn><mml:mo stretchy=false>)</mml:mo></mml:math>meson decay width" @default.
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- W1567237653 doi "https://doi.org/10.1103/physrevd.86.094507" @default.
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