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arXiv 1002.0659hep-ph
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从ILC光子-光子碰撞轻子味破坏过程探测顶色辅助的人工色

Probing topcolor-assisted technicolor from lepton flavor violating processes in photon-photon collision at ILC

Guo-Li Liu

摘要:

在顶色辅助的人工色模型(TC 2)中,新规范玻色子$Z'$诱导的无约束轻子味混合将导致在国际直线对撞机(ILC)上光子-光子碰撞中产生$τ\bar μ$、$τ\bar e$和$μ\bar e$的轻子味违反产生.通过对这些过程的比较分析,我们发现探测TC 2的更好的通道是$τ\bar μ$或$τ\bar e$的产生,由于大的混合角和大的风味变化耦合,其以比$μ\bar e$产生高得多的速率发生,并且对于大部分参数空间可以达到ILC的可检测水平。由于标准模型预测的速率远低于可检测水平,这些过程可以作为TC 2模型的灵敏探针。

英文摘要:

In topcolor-assisted technicolor models (TC2) the hitherto unconstrained lepton flavor mixing induced by the new gauge boson $Z'$ will lead to the lepton flavor violating productions of $τ\bar μ$, $τ\bar e$ and $μ\bar e$ in photon-photon collision at the proposed International Linear Collider (ILC). Through a comparative analysis of these processes, we find that the better channels to probe the TC2 is the production of $τ\bar μ$ or $τ\bar e$ which occurs at a much higher rate than $μ\bar e$ production due to the large mixing angle and the large flavor changing coupling, and may reach the detectable level of the ILC for a large part of the parameter space. Since the rates predicted by the Standard Model are far below the detectable level, these processes may serve as a sensitive probe for the TC2 model.

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