Vacuum instability in anomaly mediation models with massive neutrinos
Vacuum instability in anomaly mediation models with massive neutrinos
复制标题
大量中微子异常中介模型中的真空不稳定性
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
T. Yanagida
中科院分区：
文献类型：
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作者：
M. Kawasaki;T. Watari;T. Yanagida
研究了具有大质量中微子的反常介导超对称破缺模型的真空稳定性。结果表明，由于中微子的跷跷板诱导的质量项，真正的真空有一个大的负宇宙学常数提供了我们现在生活的真空有一个（几乎）消失的宇宙学常数。虽然从我们的假真空到真真空的量子跃迁被高度抑制，但由于热激发的存在，高温下的热跃迁不能被忽略。然而，我们发现，热转变是，事实上，可以忽略不计的小，因此异常调解模型是宇宙学安全的。因此，我们得出结论，再加热温度${T}_{R}$可能非常高（例如，${T}_{R}确保了异常中介模型中的中微子质量项。
We study the vacuum stability in the anomaly mediated supersymmetry (SUSY) breaking models with massive neutrinos. It is shown that, because of the seesaw-induced mass terms for neutrinos, the true vacuum has a large negative cosmological constant provided that the vacuum where we now live has an (almost) vanishing cosmological constant. Although the quantum transition into the true vacuum from our false vacuum is highly suppressed, the thermal transition at high temperatures may not be neglected because of the thermal excitations. However, we find that the thermal transition is, in fact, negligibly small and hence the anomaly mediation models are cosmologically safe. Thus, we conclude that the reheating temperature ${T}_{R}$ could be very high (e.g., ${T}_{R}ensuremath{gg}{10}^{10}mathrm{GeV})$ in the anomaly mediation models even with the seesaw-induced mass terms for neutrinos.