Reheating and supersymmetric flat-direction baryogenesis
Reheating and supersymmetric flat-direction baryogenesis
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再加热和超对称平向重子生成
DOI：
10.1016/s0550-3213(00)00124-3
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
J. Ellis
中科院分区：
文献类型：
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作者：
R. Allahverdi;B. Campbell;J. Ellis
我们从超对称标准模型中凝聚体沿沿着平坦方向的振荡重新研究了Affleck-Dine重子/轻子生成，该模型在暴胀时代末期获得了大的vevs。关键的观察结果是，超势相互作用耦合的平坦方向的其他领域，这获得的质量引起的平坦方向的vev可能是足够小的，他们是运动学上接近暴胀衰变。暴胀子衰变产物的等离子体可能通过这些超势汤川耦合作用在平坦方向上，产生热质量和超势破缺A项。在这种情况下，平坦方向开始振荡的时间比通常估计的要早。振荡也终止较早，由于蒸发的平方向冷凝物产生的相互作用与等离子体的暴胀衰变产物。在这些情况下，我们发现对由此产生的宇宙的重子/轻子不对称性的估计发生了实质性的改变。我们确定的方案汤川耦合到平坦的方向，和秩序和质量尺度的高维超势相互作用，设置初始平坦的方向VEV，这可能会导致可接受的重子/leptogenesis。
We re-examine Affleck–Dine baryo/leptogenesis from the oscillation of condensates along flat directions of the supersymmetric standard model, which attained large vevs at the end of the inflationary epoch. The key observation is that superpotential interactions couple the flat directions to other fields, which acquire masses induced by the flat-direction vev that may be sufficiently small for them to be kinematically accessible to inflaton decay. The resulting plasma of inflaton decay products then may act on the flat directions via these superpotential Yukawa couplings, inducing thermal masses and supersymmetry-breaking A terms. In such cases the flat directions start their oscillations at an earlier time than usually estimated. The oscillations are also terminated earlier, due to evaporation of the flat direction condensate produced by its interaction with the plasma of inflaton decay products. In these cases we find that estimates for the resulting baryon/lepton asymmetry of the universe are substantially altered. We identify scenarios for the Yukawa couplings to the flat directions, and the order and mass scale of higher-dimensional superpotential interactions that set the initial flat direction vev, that might lead to acceptable baryo/leptogenesis.