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
中科院分区:
文献类型:
--
作者:
JiJi Fan;K. Lozanov;Qianshu Lu
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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