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arXiv 0802.1994hep-ph
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LHC上$t$通道单顶产生中电弱超对称效应的全单圈计算

A complete one-loop calculation of electroweak supersymmetric effects in $t$-channel single top production at LHC

M. Beccaria, C. M. Carloni Calame, G. Macorini, E. Mirabella, F. Piccinini, F. M. Renard, C. Verzegnassi

摘要:

我们计算了强子对撞机$t$ -通道中单顶(和单反顶)产生的MSSM中完整的单圈电弱效应,推广了以前对占主导地位的$dt$末态进行的分析,并完全包括QED效应。所有过程的结果都非常相似。整体标准模型的单回路效应很小,只有几个百分比大小。这是由于弱和QED贡献的补偿是相反的符号。在mSUGRA场景中,真正的超对称性贡献通常相当适度。因此,在这个框架中,实验观测值实际上只取决于CKM $Wtb$耦合。

英文摘要:

We have computed the complete one-loop electroweak effects in the MSSM for single top (and single antitop) production in the $t$-channel at hadron colliders, generalizing a previous analysis performed for the dominant $dt$ final state and fully including QED effects. The results are quite similar for all processes. The overall Standard Model one-loop effect is small, of the few percent size. This is due to a compensation of weak and QED contributions that are of opposite sign. The genuine SUSY contribution is generally quite modest in the mSUGRA scenario. The experimental observables would therefore only practically depend, in this framework, on the CKM $Wtb$ coupling.

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