We reanalyze the 1 ＋ light hybrid from QCD sum rules with a Monte-Carlo based on uncertainty analysis. With 30% uncertainties in the accepted central values for QCD condensates and other input parameters, we obtain a...We reanalyze the 1 ＋ light hybrid from QCD sum rules with a Monte-Carlo based on uncertainty analysis. With 30% uncertainties in the accepted central values for QCD condensates and other input parameters, we obtain a prediction on the 1-＋ hybrid mass of 1.71 ± 0.22 GeV, which covers the mass of 7rl （1600）. We also study the correlations between the input and output parameters of QCD sum rules.展开更多
We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the ...We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the process. It is concluded that the SU（3） flavour symmetry may be respected in any case. However, due to chiral suppression in Go →qq, F（Go →qq qq） very likely is larger than F（Go→qq）. These results are supported by the experimental data on the decays of xco（1P） （0^＋＋）. Based on this result, we propose a criterion to identify the scalar glueball.展开更多
基金Supported by the K. C. Wong Magna Fund in Ningbo University, the National Natural Science Foundation of China m：der Grant Nos 11205093 and 11175153, and the Natural Sciences and Engineering Research Council of Canada.
文摘We reanalyze the 1 ＋ light hybrid from QCD sum rules with a Monte-Carlo based on uncertainty analysis. With 30% uncertainties in the accepted central values for QCD condensates and other input parameters, we obtain a prediction on the 1-＋ hybrid mass of 1.71 ± 0.22 GeV, which covers the mass of 7rl （1600）. We also study the correlations between the input and output parameters of QCD sum rules.
基金Supported by the National Natural Science Foundation of China under Grant No 10775117.
文摘We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the process. It is concluded that the SU（3） flavour symmetry may be respected in any case. However, due to chiral suppression in Go →qq, F（Go →qq qq） very likely is larger than F（Go→qq）. These results are supported by the experimental data on the decays of xco（1P） （0^＋＋）. Based on this result, we propose a criterion to identify the scalar glueball.
