Effects of Unstable Particles on the Cosmic Background Radiation

(1)1990年，我们计算了不稳定粒子辐射衰变引起的宇宙背景辐射畸变。我们利用畸变的极限对不稳定粒子的质量和寿命进行了约束。(2)1992年，我们构造了一个混沌暴胀模型，自然地解释了观测到的宇宙背景辐射的涨落。在这个模型中，暴胀子是右手中微子的超伙伴，因此这个模型是第一个将暴胀模型和粒子物理联系起来的例子。我们还发现暴胀子的衰变可以解释宇宙重子数的不对称性。

(1) In 1990, we calculated the distortion of cosmic background radiation caused by the radiative decays of unstable particles. We drived a constraint on the mass and life time of the unstable particles using the limit of the distortion.(2) In 1992, we constructed a chaotic inflation model which naturally explains the observed fluctuation of the cosmic background radiation. In this model the inflaton is a superpartner of the right-handed neutrino and hence this model is the first example which connects the inflation model and the particle physics. We, furthermore, found that the decay of the inflaton can explain the cosmic baryonnumber asymmetry.