标题： 暴胀宇宙学中的引力费米子产生 显示英文标题

标题： Gravitational Fermion Production in Inflationary Cosmology

摘要： 我们重新研究了暴胀宇宙学中大质量狄拉克费米子的引力产生，重点在于澄清在大质量和小质量情况下粒子数密度的解析计算。 对于引力产生的费米子质量相对于暴胀结束时的哈勃膨胀率较小的情况，我们得到了一个与暴胀模型细节几乎无关的通用数密度结果。 该结果与共形耦合标量的情况相同，除了一个数量级为一的整体乘法因子外，原因不仅仅是为了计算费米子自由度。 显示英文摘要

摘要： We revisit the gravitational production of massive Dirac fermions in inflationary cosmology with a focus on clarifying the analytic computation of the particle number density in both the large and the small mass regimes. For the case in which the masses of the gravitationally produced fermions are small compared to the Hubble expansion rate at the end of inflation, we obtain a universal result for the number density that is nearly independent of the details of the inflationary model. The result is identical to the case of conformally coupled scalars up to an overall multiplicative factor of order unity for reasons other than just counting the fermionic degrees of freedom.