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arXiv 1104.3149hep-ph
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用重体希格斯玻色子玻色子改善扭曲模型的自然性

Improving Naturalness in Warped Models with a Heavy Bulk Higgs Boson

Joan A. Cabrer, Gero von Gersdorff, Mariano Quiros

摘要:

标准模型中的希格斯玻色子玻色子应该很轻,这样才能符合LEP的电弱精确测量。我们考虑五维(5D)翘曲模型-在IR区域的度量变形-作为标准模型的UV完成与重希格斯玻色子玻色子。假设希格斯玻色子在5维体中传播,当它们的质量在LHC的范围内时,规范玻色子的Kaluza Klein(KK)模可以补偿希格斯玻色子对斜参数的贡献。KK尺度和希格斯质量之间的小层次基本上消失了,模型的自然性相对于AdS(Randall-Sundrum)模型大大提高。事实上,对于所有的希格斯玻色子质量值,微调都优于10%。

英文摘要:

A Standard-Model-like Higgs boson should be light in order to comply with electroweak precision measurements from LEP. We consider five-dimensional (5D) warped models -- with a deformation of the metric in the IR region -- as UV completions of the Standard Model with a heavy Higgs boson. Provided the Higgs boson propagates in the 5D bulk the Kaluza Klein (KK) modes of the gauge bosons can compensate for the Higgs boson contribution to oblique parameters while their masses lie within the range of the LHC. The little hierarchy between KK scale and Higgs mass essentially disappears and the naturalness of the model greatly improves with respect to the AdS (Randall-Sundrum) model. In fact the fine-tuning is better than 10% for all values of the Higgs boson mass.

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