Perturbative reheating and gravitino production in inflationary models
Perturbative reheating and gravitino production in inflationary models
复制标题
暴胀模型中的扰动再加热和重力产生
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
N. Sahu
中科院分区：
文献类型：
--
作者：
R. Rangarajan;N. Sahu
引力束缚膨胀结束时的低再热温度限制了与轻子发生模型相关的重马约拉纳中微子的产生。然而，对膨胀结束时宇宙再加热的详细观察表明，再加热期间的最高温度 T{sub max} 可能比最终再加热温度高几个数量级。这样就可以产生轻子发生所需的重马约拉纳中微子。我们对再加热过程中的引力产生及其对 T{sub max} 的依赖性进行了补充计算。我们发现，四次势再加热过程中产生的引力丰度与再加热后产生的丰度的标准估计相当，并研究了其对轻子发生的影响。
The low reheat temperature at the end of inflation from the gravitino bound constrains the creation of heavy Majorana neutrinos associated with models of leptogenesis. However, a detailed view of the reheating of the Universe at the end of inflation implies that the maximum temperature during reheating, T{sub max}, can be orders of magnitude higher than the final reheat temperature. This then allows for the production of the heavy Majorana neutrinos needed for leptogenesis. We carry out the complementary calculation of the gravitino production during reheating and its dependence on T{sub max}. We find that the gravitino abundance generated during reheating for a quartic potential is comparable to the standard estimate of the abundance generated after reheating and study its consequences for leptogenesis.