论文标题
中微子质量和重力波背景
Neutrino masses and gravitational wave background
论文作者
论文摘要
我们考虑具有三个右中微子的标准模型，以通过Seesaw机制产生微小的中微子肿块。特别是，当一个右手中微子被抑制的Yukawa耦合常数时，我们调查了案例。这种粒子的寿命很长，可以通过衰减产生额外的熵。然后，讨论熵产生对重力波背景的影响起源于原始通货膨胀。我们表明，可以通过重力波谱的变形来探测长寿命右中微子的质量和耦合常数，从而导致最轻的活性中微子质量的信息。
We consider the Standard Model with three right-handed neutrinos to generate tiny neutrino masses by the seesaw mechanism. Especially, we investigate the case when one right-handed neutrino has the suppressed Yukawa coupling constants. Such a particle has a long lifetime and can produce an additional entropy by the decay. It is then discussed the impact of the entropy production on the gravitational wave background originated in the primordial inflation. We show that the mass and the coupling constants of the long-lived right-handed neutrino can be probed by the distortion of the gravitational wave spectrum, leading to the information of the mass of the lightest active neutrino.
