The decay of the inflaton in no-scale supergravity
The decay of the inflaton in no-scale supergravity
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DOI：
10.1088/1475-7516/2007/02/018
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发表时间：
2006-12
影响因子：
6.4
通讯作者：
Motoi Endo;K. Kadota;K. Olive;F. Takahashi;T. Yanagida
中科院分区：
文献类型：
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作者：
Motoi Endo;K. Kadota;K. Olive;F. Takahashi;T. Yanagida
我们研究了膨胀子在无标度超引力中的衰减，并表明相对于最小超引力或具有一般Kähler势的模型，由于超引力效应引起的引力相互作用引起的衰减被高度抑制。我们还表明，衰变到引力子被抑制。我们证明，衰变和充分的再加热是可能的，引入一个非平凡的规范动力学项。这个通道可能在无标度超引力中占主导地位，但产生的再加热温度足够低，以避免引力子问题，同时足够高，以进行大爆炸核合成和重子生成。
We study the decay of the inflaton in no-scale supergravity and show that decay due to the gravitational interactions through supergravity effects is highly suppressed relative to the case in minimal supergravity or models with a generic Kähler potential. We also show that decay to gravitinos is suppressed. We demonstrate that decay and sufficient reheating are possible with the introduction of a non-trivial gauge kinetic term. This channel may be dominant in no-scale supergravity, yet yields a reheating temperature which is low enough to avoid the gravitino problem while high enough for big bang nucleosynthesis and baryogenesis.