Prediction of possible exotic states in the η■K* system

作者：张旭; 谢聚军

来源：Chinese Physics C, 2020, 44(05): 74-80.

We investigate the ηKK*three-body system in order to look for possible IG(JPC)=0+(1-+) exotic states in the framework of the fixed-center approximation of the Faddeev equation.We assume the scattering of η on a clusterized system KK*,which is known to generate f1(1285),or a K in a clusterized system ηK*,which is shown to generate K1(1270).In the case of η-(KK*)f1(1285) scattering,we find evidence of a bound state IG(JPC)=0+(1-+) below theηf1(1285) threshold with a mass of around 1700 MeV and a width of about 180 MeV.Considering K-(η/K*)K1(1270)scattering,we obtain a bound state I(JP)=0(1-) just below the KK1(1270) threshold with a mass of around 1680 MeV and a width of about 160 MeV.

• 单位
  郑州大学; 中国科学院大学