The production of1+(1+−) four quark states in the pp annihilations

By calculating the widths and branching ratios of possible four quark states IG(Jpc)=1+(1+−) based on the diquark cluster model, it is shown that experimental data reported by the Crystal Barrel Collaboration does not disprove the existence of a 1+(1+−) four quark state BB10(1475), and that more prices measurement and the partial wave analysis may support the four quark state an alternative explanation for the data.