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arXiv 0710.4121hep-ph
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正负电子对撞机中电子和中微子的带电希格斯玻色子玻色子产生

Charged Higgs-boson production in association with an electron and a neutrino at electron-positron colliders

Oliver Brein, Terrance Figy

摘要:

本文给出了在正负电子对撞机(e+ e- -> H+ e-nu_e-bar,H-e + nu_e)上,由一个电子和一个中微子产生带电希格斯玻色子的截面的计算结果。我们研究的最小超对称标准模型(MSSM)和两个希格斯双重模型(THDM)的横截面的预测,突出可能的差异。在这两种模型中,该过程都是有效的循环诱导的。因此,预期截面与模型密切相关。最值得注意的是,由于超伴子的存在,MSSM振幅包含五边形类型的费曼图,这在THDM中不存在。这是在THDM和MSSM中首次完整的截面单回路计算。到目前为止,这两个模型都只有有效性范围有限的近似结果。我们在这里的主要目的是澄清几个开放的问题,在现有的文献对这一进程。具体地说,我们将讨论重费米子环近似在两个模型中的有效性,以及费米子/S费米子环近似在MSSM。

英文摘要:

We present results of a calculation of the cross section for the production of a charged Higgs boson in association with an electron and a neutrino at electron-positron colliders (e+ e- -> H+ e- nu_e-bar, H- e+ nu_e). We study predictions for the cross section in the Minimal Supersymmetric Standard Model (MSSM) and the Two Higgs Doublet Model (THDM), highlighting possible differences. The process is effectively loop-induced in both models. Hence, the cross section is expected to be strongly model-dependent. Most notably, due to the presence of superpartners, the MSSM amplitude contains Feynman graphs of pentagon-type, which are not present in the THDM. This is the first complete one-loop calculation of the cross section for this process in the THDM and the MSSM. For both models, so far, only approximate results with limited ranges of validity were available. Our main aim here is to clarify several open questions in the existing literature on this process. Specifically, we will discuss the validity of the Heavy Fermion loop approximation in both models, and of the Fermion/Sfermion loop approximation in the MSSM.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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