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arXiv 2009.14218hep-phastro-ph.CO
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暴胀过程中希格斯玻色子动力学引起的再加热对标准模型粒子的大密度扰动

Large Density Perturbations from Reheating to Standard Model particles due to the Dynamics of the Higgs Boson during Inflation

Aliki Litsa, Katherine Freese, Evangelos I. Sfakianakis, Patrick Stengel, Luca Visinelli

摘要:

宇宙微波背景辐射(CMB)观测被用来约束再加热到膨胀一段时间后的标准模型(SM)粒子。作为一个光的旁观者场,SM希格斯玻色子在暴胀期间从其量子涨落中获得大的场值,使SM粒子的质量从一个哈勃补丁变化到另一个,从而产生大的密度涨落。我们考虑微扰和共振衰变的膨胀SM粒子。对于高尺度暴胀后暴胀子相干振荡的微扰衰变的情况,我们发现暴胀子衰变成重SM粒子的再热温度有很强的约束。对于共振粒子生产(预热)(希格斯)SM规范玻色子的情况下,我们发现的温度波动大于在CMB中观察到的规范耦合的范围,其中包括那些在SM中发现的,并得出结论,这种预热不能再加热宇宙膨胀后的主要来源。

英文摘要:

Cosmic Microwave Background (CMB) observations are used to constrain reheating to Standard Model (SM) particles after a period of inflation. As a light spectator field, the SM Higgs boson acquires large field values from its quantum fluctuations during inflation, gives masses to SM particles that vary from one Hubble patch to another, and thereby produces large density fluctuations. We consider both perturbative and resonant decay of the inflaton to SM particles. For the case of perturbative decay from coherent oscillations of the inflaton after high scale inflation, we find strong constraints on the reheat temperature for the inflaton decay into heavy SM particles. For the case of resonant particle production (preheating) to (Higgsed) SM gauge bosons, we find temperature fluctuations larger than observed in the CMB for a range of gauge coupling that includes those found in the SM and conclude that such preheating cannot be the main source of reheating the Universe after inflation.

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