摘要
Measurements of decay asymmetry parameters of charmed baryons,e.g.,Ξ0c,provide more data to test the W-emission and W-exchange mechanisms controlled by strong and weak interactions.Taking advantage of the spin polarization in charmed baryon decays,we investigate the possibility to measure weak decay asymmetry parameters in the e^+e^-→Ξ0cΞ0c process.We analyze the transverse polarization spontaneously produced in this process and the spin transfer in the subsequent Ξc decays.The sensitivity to measure the asymmetry parameters is estimated for the decay Ξc→Ξ0π.
Measurements of decay asymmetry parameters of charmed baryons,e.g.,■,provide more data to test the W-emission and W-exchange mechanisms controlled by strong and weak interactions.Taking advantage of the spin polarization in charmed baryon decays,we investigate the possibility to measure weak decay asymmetry parameters in thee^+e^-→■ process.We analyze the transverse polarization spontaneously produced in this process and the spin transfer in the subsequent■ decays.The sensitivity to measure the asymmetry parameters is estimated for the decay■→■.
作者
韩童竹
平荣刚
罗涛
许广智
Tong-Zhu Han;Rong-Gang Ping;Tao Luo;Guang-Zhi Xu(Key Laboratory of Nuclear Physics and Ion-beam Application(MOE)and Institute of Modern Physics,Fudan University,Shanghai 200443,China;Physics department,Liaoning University,Shenyang 110036,China;Institute of High Energy Physics,Chinese Academy of Sciences,P.O.Box 918(1),Beijing 100049,China;University of Chinese Academy of Science,Beijing 100049,China)
基金
Supported by the National Natural Science Foundation of China(11875262,11805037,11705078)
Joint Large-Scale Scientific Facility Funds of the NSFC and CAS(U1832121)
Shanghai Pujiang Program(18PJ1401000)
Open Research Program of Large Research Infrastructures(2017),Chinese Academy of Sciences
