Flavor Changing Top Quark Decay and Bottom-Strange Production in the Littlest Higgs Model with T-parity
Flavor Changing Top Quark Decay and Bottom-Strange Production in the Littlest Higgs Model with T-parity
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DOI：
10.1088/0253-6102/59/4/10
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发表时间：
2012-10
影响因子：
3.1
通讯作者：
Ya-jin Zhou;Hong-Sheng Hou;Hao Sun
中科院分区：
文献类型：
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作者：
Ya-jin Zhou;Hong-Sheng Hou;Hao Sun
研究了LHT模型中t → ch，e+e− → B，e+e− → bh和pp → B过程的味变化效应.计算了T宇称奇镜像费米子和规范玻色子的单圈能级贡献。结果表明，LHT模型中的顶夸克稀有衰变t → ch比SM模型中的强得多.在LHT模型中，直线对撞机上的B产生能使SM截面大大增强，在实验允许的参数范围内可达到0.1 fb。而重规范玻色子和镜像费米子环对pp → B和e+e− → bh过程的贡献很小。因此，LHT对e+e− → B的影响可能在未来的线性对撞机上被检测到，而对于未来的线性对撞机和LHC的e+e− → bh和pp → B过程，它太小了，无法被观察到。
Flavor changing effects on the processes t → ch, e+e− → b, e+e− → bh and pp → b in the LHT model are investigated in this paper. We calculate the one-loop level contributions from the T-parity odd mirror fermions and gauge bosons. The results show that the top quark rare decay t → ch in the LHT model can be significantly enhanced relative to that in the SM. The b production at linear colliders in the LHT model can enhance the SM cross section a lot and reach 0.1 fb in some parameter space allowed in the experiment. But the heavy gauge boson and mirror fermion loops have small contribution to the processes pp → b and e+e− → bh. So the LHT effect on e+e− → b might be detected at future linear colliders, while it is too small to be seen for the e+e− → bh and pp → b processes at future linear colliders and LHC.