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- W2128206003 abstract "We perform a QCD sum-rule study of the open-charmed ${D}_{s}(2317)$ as a four-quark state. Using the diquark-antidiquark picture for the four-quark state, we consider four possible interpolating fields for ${D}_{s}(2317)$, namely, scalar-scalar, pseudoscalar-pseudoscalar, vector-vector, and axial-vector--axial-vector types. We test all four currents by constructing four separate sum rules. The sum-rule with the scalar-scalar current gives a stable value for the ${D}_{s}$ mass which qualitatively agrees with the experimental value, and the result is not sensitive to the continuum threshold. The vector-vector sum rule also gives a stable result with small sensitivity to the continuum threshold and the extracted mass is somewhat lower than the scalar-scalar current value. On the other hand, the two sum rules in the pseudoscalar and axial-vector channels are found to yield the mass highly sensitive to the continuum threshold, which implies that a four-quark state with the combination of pseudoscalar-pseudoscalar or axial-vector--axial-vector type would be disfavored. These results would indicate that ${D}_{s}(2317)$ is a bound state of scalar-diquark and scalar-antidiquark and/or vector-diquark and vector-antidiquark." @default.
- W2128206003 created "2016-06-24" @default.
- W2128206003 creator A5034968472 @default.
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- W2128206003 date "2005-10-13" @default.
- W2128206003 modified "2023-10-16" @default.
- W2128206003 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi>D</mml:mi><mml:mi>s</mml:mi></mml:msub><mml:mo stretchy=false>(</mml:mo><mml:mn>2317</mml:mn><mml:mo stretchy=false>)</mml:mo></mml:math>as a four-quark state in QCD sum rules" @default.
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- W2128206003 doi "https://doi.org/10.1103/physrevd.72.074012" @default.
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