LHC上bar{t}tZ^0产生的超对称QCD和CP破缺效应[EB/OL]
北京：中国科技论文在线
） 摘要： 我们研究了在大型强子对撞机（LHC）上t\bar{t}tZ^0$产生过程zai最小超对称模型（MSSM）下的NLO QCD和CP破缺效应
我们的数值结果证明在CP守恒的MSSM下纯超对称QCD修正普遍地降低了总的类标准模型QCD修正
我们的计算表明在CP守恒的MSSM中总NLO QCD修正可以明显改善领头阶的能标不确定性
） Abstract： We investigate the NLO QCD and the CP-violation effects in t\bar{t}Z^0 production at the Large Hadron Collider(LHC) in the minimal supersymmetric standard model(MSSM)
Our calculation shows that the total NLO QCD correction in the framework of the CP-conserving MSSM significantly improves the scale uncertainty at the leading order, and the contribution from the pure supersymmetric QCD (pSQCD) correction can exceed $-8%$ with the restrictions of $90~GeV < p_T^t < 120~GeV$ and $120~GeV < p_T^Z < 150~GeV$, where $p_T^t$ and $p_T^Z$ are the transverse momenta of the top-quark and $Z^0$ gauge boson, respectively
Our numerical results demonstrate that the pure supersymmetric QCD correction generally suppresses the total SM-like QCD correction in the CP-conserving MSSM, and tends to be a constant when either $ ilde{t}_1$ or $ ilde{g}$ is heavy enough
We find also that the CP-odd asymmetry ${cal A}_{Phi}$ can reach $2
17 imes 10^{-3}$, if the CP-phase angle really exists in the coupling of gluino-stop-top
Keywords： Particle physics;LHC;MSSM;CP-violation 下载PDF阅读器 PDF全文下载： 初稿 （ 175 ） 作者简介： Liu Ning(1983), Female, Doctor student, High energy physics 通信联系人： Zhang Ren-You, male, Assistent professor, High energy physics 【收录情况】 中国科技论文在线： 刘宁
CP破缺 Liu Ning
郭磊
郭磊
纯超对称QCD（pSQCD）修正在$90~GeV < p_T^t < 120~GeV$ 和$120~GeV < p_T^Z < 150~GeV$区间能达到$-8%$
CP为奇的对称参数 ${cal A}_{Phi}$ 达到 $2
