超对称模型下ννZ顶点的在壳重整化

Research About On-shell Renormalization for Vertice ννZ in Super-symmetry Model

为了探索和完善超对称模型的重整化理论,研究了在超对称模型下三角图的在壳重整化问题,其中三角图的外线是标准模型粒子而内线为超对称粒子.计算了ννZ过程(内线粒子为标量中微子和中性微子)的发散部分,推导出与发散部分相抵消的重整化常数,从而三角图的发散被抵消项完全消除.研究表明在三角图和重整化常数的选取上,超对称和标准模型是有差别的.

In order to explore and perfect the renormalization theory of the super-symmetry model,the on-shell renormalization of the triangle diagrams with outside standard model particles and inside super-symmetry particles is studied.The divergent part of the process（inside particles are sneutrinos and neutralinos） is calculated.The renormalization constant is derived which can offset the divergent part successfully.It proves that the divergences of the triangle diagrams have been eliminated completely.The work shows that there is difference between the standard model and the super-symmetry model on the selection of the triangular diagrams and renormalization constants.