A new observable, the angle between ■ decay planes, is proposed to test the theoretical predictions on the spin correlation. With 10 billion J/ψ events collected with the BES Ⅲ detector at the BEPCⅡ e^+e^- collide...A new observable, the angle between ■ decay planes, is proposed to test the theoretical predictions on the spin correlation. With 10 billion J/ψ events collected with the BES Ⅲ detector at the BEPCⅡ e^+e^- collider, the distribution of the angle could be measured to verify whether or not a correlation exists.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 11661141008
文摘A new observable, the angle between ■ decay planes, is proposed to test the theoretical predictions on the spin correlation. With 10 billion J/ψ events collected with the BES Ⅲ detector at the BEPCⅡ e^+e^- collider, the distribution of the angle could be measured to verify whether or not a correlation exists.
