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arXiv 0710.2484hep-phastro-phhep-th
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希格斯质量测量的宇宙学意义

Cosmological implications of the Higgs mass measurement

J. R. Espinosa, G. Giudice, A. Riotto

摘要:

我们假设标准模型在任意高能尺度下都是有效的,并讨论了从希格斯质量的测量中可以提取出宇宙早期阶段的哪些信息。当Mh < 130 GeV时,Higgs势会在大的场值下产生不稳定性。从过度的热希格斯场波动的情况下,我们得到一个约束的膨胀后的再热温度作为希格斯和顶部质量的函数。然后,我们讨论了在暴胀的原始阶段和宇宙学扰动产生的量子希格斯波动之间的相互作用,在景观的背景下,暴胀参数扫描。我们表明,在大场暴胀模型,这是极不可能获得所观察到的宇宙学扰动在一个宇宙与轻希格斯粒子。此外,独立于暴胀模型,通过CMB偏振的B模式检测到原始张量扰动和发现轻希格斯粒子只能以指数小概率同时发生,除非有新的物理学超越标准模型。

英文摘要:

We assume the validity of the Standard Model up to an arbitrary high-energy scale and discuss what information on the early stages of the Universe can be extracted from a measurement of the Higgs mass. For Mh < 130 GeV, the Higgs potential can develop an instability at large field values. From the absence of excessive thermal Higgs field fluctuations we derive a bound on the reheat temperature after inflation as a function of the Higgs and top masses. Then we discuss the interplay between the quantum Higgs fluctuations generated during the primordial stage of inflation and the cosmological perturbations, in the context of landscape scenarios in which the inflationary parameters scan. We show that, within the large-field models of inflation, it is highly improbable to obtain the observed cosmological perturbations in a Universe with a light Higgs. Moreover, independently of the inflationary model, the detection of primordial tensor perturbations through the B-mode of CMB polarization and the discovery of a light Higgs can simultaneously occur only with exponentially small probability, unless there is new physics beyond the Standard Model.

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