标题： 大质量费米子在再加热过程中的产生与轻子生成 显示英文标题

标题： Production of Massive Fermions at Preheating and Leptogenesis

摘要： 我们完整计算了暴胀子在再加热期间衰变为非常大质量费米子的过程。 我们表明，重费米子可以非常有效地产生，质量范围达到10^{17}-10^{18}GeV；因此可访问的质量范围甚至比重玻色子的范围更广。 我们将这些发现应用于轻子生成情景，提出了一种新的版本，在该版本中，负责产生重子不对称性的大质量右手中微子是在再加热期间产生的。 我们还讨论了早期宇宙中右手中微子的其他产生机制，并确定了能够再现观测到的重子不对称性的中微子质量参数。 显示英文摘要

摘要： We present a complete computation of the inflaton decay into very massive fermions during preheating. We show that heavy fermions are produced very efficiently up to masses of order 10^{17}-10^{18} GeV; the accessible mass range is thus even broader than the one for heavy bosons. We apply our findings to the leptogenesis scenario, proposing a new version of it, in which the massive right-handed neutrinos, responsible for the generation of the baryon asymmetry, are produced during preheating. We also discuss other production mechanisms of right-handed neutrinos in the early Universe, identifying the neutrino mass parameters for which the observed baryon asymmetry is reproduced.