In Ref. [1], (770) vector resonance, its radial recurrences, and the corresponding P-wave phase shifts were investigated in an unquenched quark model with all classes of relevant decay channels included, viz. pseu...In Ref. [1], (770) vector resonance, its radial recurrences, and the corresponding P-wave phase shifts were investigated in an unquenched quark model with all classes of relevant decay channels included, viz. pseudoscalarpseudoscalar,vector-pseudoscalar, vector-vector, vector-scalar, axialvector-pseudoscalar, and axialvector-vector, totalling26 channels.展开更多
We take the viewpoint that X（1576） is the tetraquark state which consists of a scalar diquark and an antiscalar-diquark in relative P-wave, and calculate its mass in the framework of the QCD sum rule approach. The n...We take the viewpoint that X（1576） is the tetraquark state which consists of a scalar diquark and an antiscalar-diquark in relative P-wave, and calculate its mass in the framework of the QCD sum rule approach. The numerical value of the mass mx= （1.66 =k 0.14） GeV is consistent with the experimental data. There might be some tetraquark components in the vector meson X（1576）.展开更多
With the Munczek-Nemirovsky model of the effective gluon propagator in the global colour model, we study the radially excited solitons in which one quark is excited and the other two are at the ground state. The obtai...With the Munczek-Nemirovsky model of the effective gluon propagator in the global colour model, we study the radially excited solitons in which one quark is excited and the other two are at the ground state. The obtained masses of the two radial excitations are comparable with the experimental data.展开更多
We study charmonium （ccnn）,bottomonium （b bnn） and exotic （ccnn and bbnn） four-quark states by means of a standard non-relativistic quark potential model.We look for possible bound states.Among them we are able ...We study charmonium （ccnn）,bottomonium （b bnn） and exotic （ccnn and bbnn） four-quark states by means of a standard non-relativistic quark potential model.We look for possible bound states.Among them we are able to distinguish between meson-meson molecules and compact four-quark states.展开更多
文摘In Ref. [1], (770) vector resonance, its radial recurrences, and the corresponding P-wave phase shifts were investigated in an unquenched quark model with all classes of relevant decay channels included, viz. pseudoscalarpseudoscalar,vector-pseudoscalar, vector-vector, vector-scalar, axialvector-pseudoscalar, and axialvector-vector, totalling26 channels.
基金Supported by the National Natural Science Foundation under Grant No 10405009, and the Key Program Foundation of North China Electric Power University.
文摘We take the viewpoint that X（1576） is the tetraquark state which consists of a scalar diquark and an antiscalar-diquark in relative P-wave, and calculate its mass in the framework of the QCD sum rule approach. The numerical value of the mass mx= （1.66 =k 0.14） GeV is consistent with the experimental data. There might be some tetraquark components in the vector meson X（1576）.
基金Supported by the National Natural Science Foundation of China under contract Nos 10425521, 10575004 and 106750077 the Key Project of the Ministry of Education of China under Grant No 305001, the Research Fund for the Doctoral Programme of Higher Education of China under Grant No 20040001010, and the Foundation for University Key Teachers by the Ministry of Education of China.
文摘With the Munczek-Nemirovsky model of the effective gluon propagator in the global colour model, we study the radially excited solitons in which one quark is excited and the other two are at the ground state. The obtained masses of the two radial excitations are comparable with the experimental data.
基金partially funded by Ministerio de Ciencia y Tecnología under Contract No.FPA2007-65748EUFEDER,and by Junta de Castilla y León under Contracts No.SA016A17 and GR12
文摘We study charmonium （ccnn）,bottomonium （b bnn） and exotic （ccnn and bbnn） four-quark states by means of a standard non-relativistic quark potential model.We look for possible bound states.Among them we are able to distinguish between meson-meson molecules and compact four-quark states.
