We search for the ψ（4S）state in the B±→ηJ/ψK± and e＋e-→η/Jψ processes based on the Belle measurements with the assumed mass M =（4230±8）MeV/C2 and width Г=（38±12）MeV. No significant s...We search for the ψ（4S）state in the B±→ηJ/ψK± and e＋e-→η/Jψ processes based on the Belle measurements with the assumed mass M =（4230±8）MeV/C2 and width Г=（38±12）MeV. No significant signal is observed in the in mass spectra. The 90% confidence level upper limit on the product branching fraction B（B±→（4S）→e＋e-to be 0.63 keV,a branching fraction limit B（ψ（4S）→ηJ/ψ）〈1.3% is obtained at the 90% confidence level in e＋e-→η/Jψ,which is consistent with the theoretical prediction.展开更多
基金Supported by Fundamental Research Funds for the Central Universities(YWF-14-WLXY-013)National Natural Science Foundation of China(11575017)CAS Center for Excellence in Particle Physics(China)
文摘We search for the ψ（4S）state in the B±→ηJ/ψK± and e＋e-→η/Jψ processes based on the Belle measurements with the assumed mass M =（4230±8）MeV/C2 and width Г=（38±12）MeV. No significant signal is observed in the in mass spectra. The 90% confidence level upper limit on the product branching fraction B（B±→（4S）→e＋e-to be 0.63 keV,a branching fraction limit B（ψ（4S）→ηJ/ψ）〈1.3% is obtained at the 90% confidence level in e＋e-→η/Jψ,which is consistent with the theoretical prediction.
