光子对撞机上超对称夸克对产生的极化效应  

The Effects of Polarization to Squark Pair Production Via γγ Collisions

作　　者：邢利荣[1] 周雅瑾[2] 

机构地区：[1]上海电力学院数理系,上海201300 [2]中国科学技术大学近代物理系,合肥230027

出　　处：《河南师范大学学报（自然科学版）》2009年第1期74-77,81,共5页Journal of Henan Normal University(Natural Science Edition)

基　　金：上海市教委一般项目基金(06LZ007);上海电力学院科研启动基金(F05002);中国博士后科学基金(20070410212)共同资助

摘　　要：研究了γγ→■■过程中光子极化对其树图阶和完整一圈电弱修正截面的效应,给出了具体的计算结果,并与非极化光子对撞机上结果进行了比较.发现这些squark对产生过程的光子极化效应在某些给定的参数条件下相当大.γγ→■■的set2参数条件下,在1.17TeV处,树图截面和电弱修正的截面分别增加了81%和78%.因此在未来的直线对撞机上以γγ对撞模式产生标量夸克对时,在某些特定的类gaugino的参数条件下,考虑到光子的极化效应对其截面的影响将有助于提高对撞机的探测效率.The research calculates the tree-level and full one-loop eleetroweak （EW） corrections to the third generation scalar-quark pair production in polarized γγ collisions in the minimal supersymmetric standard model （MSSM）, and compares the numerical results with the unpolarized. The numerical results show that the effects of γγ polarization to squark pair production are substantial and can not be neglected under some parameter space. With set2 paprameters, at√s= 1.17 TeV the tree level and EW corrected sections of γγ→t2 t2 increase by 81% and 78% respectively, compared with unpolarized tree level and EW corrected sections. Therefore, in some gaugino--like parameters, the effects of the photon polarization to squark pair production can improve the efficiency of detection at future linear colliders.

关 键 词：光子极化 超对称 完整一圈 修正 

分 类 号：O572.2[理学—粒子物理与原子核物理]