We investigate the leading SUSY-QCD contributions to the branch ratio(BR)oft→ch^0 within the context of the minimal supersymmetric standard model(MSSM) with coplex parameters,assuming more generally that there is a m...We investigate the leading SUSY-QCD contributions to the branch ratio(BR)oft→ch^0 within the context of the minimal supersymmetric standard model(MSSM) with coplex parameters,assuming more generally that there is a misalignment between the squark and quark that leads to a flavor non-diagonal squark mass matrix.We introduce complex phases only in μ and At,namelyФμ and ФAq,for simplicity,and study the dependence of the BRoft→ch^0on these phase parameters.Our calculations show that these CP-violation phases and the flavor mixing parameter λinfluence the BR oft→ch^0 considerably,and the effect induced by ФAt is much larger than that byФμ and ФAc1u.For diffrent values of the complex parameters μand At that are set in this paper,the BR oft→ch^0is in the range of 10^-7—10^-6,depending mainly on the value of the trilinear coupling展开更多
基金The project supported in part by National Natura Science Foundation of China and a grant from the University of Science and Technology of China
文摘We investigate the leading SUSY-QCD contributions to the branch ratio(BR)oft→ch^0 within the context of the minimal supersymmetric standard model(MSSM) with coplex parameters,assuming more generally that there is a misalignment between the squark and quark that leads to a flavor non-diagonal squark mass matrix.We introduce complex phases only in μ and At,namelyФμ and ФAq,for simplicity,and study the dependence of the BRoft→ch^0on these phase parameters.Our calculations show that these CP-violation phases and the flavor mixing parameter λinfluence the BR oft→ch^0 considerably,and the effect induced by ФAt is much larger than that byФμ and ФAc1u.For diffrent values of the complex parameters μand At that are set in this paper,the BR oft→ch^0is in the range of 10^-7—10^-6,depending mainly on the value of the trilinear coupling
