摘要
We investigate the problem on how to factorize a coupled channel scattering S matrix into a product of simple S matrices. Simple S matrix solntions are found, respecting unitarity, analyticity and being real analytic. The phase shift and its physical meaning produced by these simple S matrices are discussed.
基金
The projccl, snpportecd by Ilui-Chun Chin and Tsung-Dao Lce Chhmsc Undcrgradua,te Resea,rch Endowment （CURE） and partly by National Natural Science Foundation of China tamer Grant： Nos, 10575002 and 10421503
