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arXiv 1407.4112hep-phastro-ph.COhep-th
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顶质量测定、希格斯膨胀和真空稳定性

Top mass determination, Higgs inflation, and vacuum stability

Vincenzo Branchina, Emanuele Messina, Alessia Platania

摘要:

标准模型(SM)之外的新物理学只出现在普朗克尺度$M_P$的可能性经常被考虑。然而,人们通常认为,新的物理相互作用在$M_P$不影响SM稳定性相图,所以后者得到忽略这些条款。根据这张图,对于目前的实验值的顶和希格斯质量,我们的宇宙生活在一个亚稳态(具有非常长的寿命),接近稳定的边缘。然而,与这些期望相反,我们表明,稳定性相图强烈依赖于新的物理,尽管声称相反,更精确的测定的顶部(以及希格斯)质量将不允许区分稳定性,亚稳性或临界性的电弱真空。与此同时,我们表明,实现希格斯膨胀的情况下(所有获得忽略新的物理)所需的条件是太敏感的存在下,新的相互作用在$M_P$。因此,希格斯暴胀情景需要非常严格的微调,这对这些模型产生了严重的怀疑。

英文摘要:

The possibility that new physics beyond the Standard Model (SM) appears only at the Planck scale $M_P$ is often considered. However, it is usually argued that new physics interactions at $M_P$ do not affect the SM stability phase diagram, so the latter is obtained neglecting these terms. According to this diagram, for the current experimental values of the top and Higgs masses, our universe lives in a metastable state (with very long lifetime), near the edge of stability. Contrary to these expectations, however, we show that the stability phase diagram strongly depends on new physics and that, despite claims to the contrary, a more precise determination of the top (as well as of the Higgs) mass will not allow to discriminate between stability, metastability or criticality of the electroweak vacuum. At the same time, we show that the conditions needed for the realization of Higgs inflation scenarios (all obtained neglecting new physics) are too sensitive to the presence of new interactions at $M_P$. Therefore, Higgs inflation scenarios require very severe fine tunings that cast serious doubts on these models.

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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