论文标题
在低温下用于男性生成的高能量掌
High Energy Sphalerons for Baryogenesis at Low Temperatures
论文作者
论文摘要
我们在将宇宙重新加热为$ \ lyssim 100 \，$ gev的情况下讨论了男性生成，这是由于长期寿命的巨大颗粒衰减到高能的SM颗粒中。在其热化之前，即使等离子体本身的温度要低得多，也可能高于典型的sphaleron质量，在这种粒子和粒子之间的碰撞中的质量中心能量也可以高于典型的sphaleron质量。对Sphaleron横截面的高能增强的乐观估计表明，可以将成功的男性生成重新加热，以使温度低至$ 0.1 \ text { - } 1 \，$ GEV。通过简单的SM扩展，即使Sphaleon速率更加悲观的结果是正确的，也可以实现足够的Baryon产生。在这两种情况下，这种情况都可以在对撞机和宇宙射线实验中进行探测。我们简要讨论所需CP违规的可能起源。
We discuss baryogenesis in scenarios where the Universe is reheated to temperatures $\lesssim 100\,$GeV by the decay of long-lived massive particles into energetic SM particles. Before its thermalization, the center-of-mass energy in collisions between such a particle and a particle from the ambient plasma can be higher than the typical sphaleron mass, even if the temperature of the plasma itself is much lower. Optimistic estimates for the high energy enhancement of the sphaleron cross section suggest that successful baryogenesis is possible for reheating temperatures as low as $0.1\text{-}1\,$GeV. With a simple extension of the SM, sufficient baryon production can be achieved even if more pessimistic results for the sphaleron rate are correct. In both cases this scenario can be probed in collider and cosmic-ray experiments. We briefly discuss the possible origin of the required CP violation.
