Spillway preheating

Spillway preheating
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溢洪道预热

DOI:
10.1007/jhep05(2021)069
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发表时间:
2021
影响因子:
5.4
通讯作者:
Qianshu Lu
Qianshu Lu
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
JiJi Fan;K. Lozanov;Qianshu Lu

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在传统的模型中,只有一个订单的一部分能量从暴胀转移到辐射通过非微扰共振生产后立即膨胀预热,由于反反应效应。我们提出了一种粒子生产机制,可以提高高达四个数量级的暴胀子能量密度的消耗。这种改进来自于共振产生的子粒子的快速微扰衰变。它们作为一个“泄洪道”来排出这些子粒子,减少它们对暴胀子的反作用,并使共振产生的有效时间更长。因此,我们称之为“溢洪道预热”的情况。我们还表明,在暴胀子中剩余的能量密度的分数有一个简单的逆幂律标度的情况下。一般来说,溢流道预热是一种更有效的能量耗散机制,这可能在粒子物理模型构建中有其他应用。
In traditional models only an order one fraction of energy is transferred from the inflaton to radiation through nonperturbative resonance production in preheating immediately after inflation, due to backreaction effects. We propose a particle production mechanism that could improve the depletion of the inflaton energy density by up to four orders of magnitude. The improvement comes from the fast perturbative decays of resonantly produced daughter particles. They act as a “spillway” to drain these daughter particles, reducing their backreaction on the inflaton and keeping the resonant production effective for a longer period. Thus we dub the scenario “spillway preheating”. We also show that the fraction of energy density remaining in the inflaton has a simple inverse power-law scaling in the scenario. In general, spillway preheating is a much more efficient energy dissipation mechanism, which may have other applications in model building for particle physics.
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