【摘 要】
：
We investigate the leading SUSY-QCD contributions to the branch ratio (BR) oft → ch0 within the context of the minimal supersymmetric standard model (MSSM) wit
【机 构】
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Department of Modern Physics
【基金项目】
：
国家自然科学基金;中国科技大学校科研和教改项目
论文部分内容阅读
We investigate the leading SUSY-QCD contributions to the branch ratio (BR) oft → ch0 within the context of the minimal supersymmetric standard model (MSSM) with complex 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 Iμ and At, namely φμ and φAq, for simplicity, and study the dependence of the BR oft → ch0on these phase parameters. Our calculations show that these CP-violation phases and the flavor mixing parameter λinfluence the BR oft → ch0 considerably, and the effect induced by φAt is much larger than that by φμ and φAc,μ. For different values of the complex parameters μ and At that are set,in this paper, the BR of t → ch0 is in the range of 10-7 ～ 10-6, depending mainly on the value of the trilinear coupling At.
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