T-odd asymmetries in radiative top-quark decays
T-odd asymmetries in radiative top-quark decays
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DOI：
10.1088/1126-6708/2007/12/041
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发表时间：
2007-07
影响因子：
5.4
通讯作者：
K. Hagiwara;K. Mawatari;H. Yokoya
中科院分区：
文献类型：
--
作者：
K. Hagiwara;K. Mawatari;H. Yokoya
本文研究了当辐射出一个硬胶子时，顶夸克衰变为底夸克和W玻色子，W玻色子又衰变为lνl的过程中带电轻子的角分布。在微扰QCD单圈水平上计算了t → bWg衰变振幅的吸收部分，这部分吸收引起了分布中的T奇不对称性.在百分之几的水平上的不对称性的预测，这可能是在未来的对撞机观察。
We study the angular distribution of the charged lepton in the top-quark decay into a bottom quark and a W boson which subsequently decays into lνl, when a hard gluon is radiated off. The absorptive part of the t → bWg decay amplitudes, which gives rise to T-odd asymmetries in the distribution, is calculated at the one-loop level in perturbative QCD. The asymmetries at a few percent level are predicted, which may be observable at future colliders.