the framework of the Gaussian sum rules is used to reduce the interference from the background of the excited states and the continuum.First
the Gaussian sum rule for the Ds(0+) meson current is obtained by means of Laplace transformation.Based on it
the Gaussian sum rules for the mass and the decay constant of Ds(0+) meson are then worked out to be mGauss=2.41±0.05±0.15 GeV and fGauss=0.30±0.02 GeV.Using the standard input of QCD universal parameters
the corresponding curves and tables are presented.The result we get is smaller than the results of Borel sum rule(mBorel=2.48±0.03 GeV)
but they are well in accordance with the experimental data(mexp=2.317 6±0.001 3 GeV) within the bounds of the theoretical estimate.
关键词
量子色动力学Gaussian求和规则Borel求和规则Ds(0+)介子
Keywords
quantum chromodynamicsGaussian sum ruleBorel sum ruleDs(0+) meson