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arXiv 1209.2277hep-phastro-ph.COhep-th
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标准模型希格斯粒子能在我们的宇宙中形成结构吗?

Can Standard Model Higgs Seed the Formation of Structures in Our Universe?

Ki-Young Choi, Qing-Guo Huang

摘要:

我们研究了标准模型希格斯场作为原始曲率扰动的来源,特别是在曲率和调制再加热的情况下。我们的结论是,由于希格斯粒子衰变时的能量密度很小,它不能作为一个弯曲子,但希格斯粒子的调制再加热可能是一个可行的方案。在后一种情况下,不可避免地产生非高斯性,并强烈地限制了暴胀子场和Higgs相关相互作用项的势的类型。对于衰变率非线性依赖于Higgs真空期望值的暴胀子场的二次势,Higgs场对原初曲率微扰的贡献必须小于8%.

英文摘要:

We study the Standard Model Higgs field as a source for the primordial curvature perturbation, particularly in the curvaton and modulated reheating scenario. We conclude that the Higgs cannot play as a curvaton due to the small energy density when it decays, however the modulated reheating by Higgs can be a viable scenario. In the latter case, the non-Gaussianity is inevitably generated and strongly constrains the type of potential of inflaton field and Higgs-dependent interaction term. For the quadratic potential of the inflaton field with decay rate which non-linearly depends on the Higgs vacuum expectation value, the contribution of Higgs field to the primordial curvature perturbation must be less than 8%.

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