Cosmological consequences of particle creation during inflation
Cosmological consequences of particle creation during inflation
复制标题
暴胀期间粒子产生的宇宙学后果
DOI：
10.1103/physrevd.57.7120
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发表时间：
1996
影响因子：
5
通讯作者：
D. Roberts
中科院分区：
文献类型：
--
作者：
D. Lyth;D. Roberts
考虑了膨胀过程中的粒子创建。对于相互作用较强或较弱的物种来说，这一点可能很重要。给出了自旋为零的粒子和自旋为半个粒子的完整而又经济的形式，并在假设早期宇宙中的粒子质量为哈勃参数的数量级的情况下估算了粒子丰度。这对两个自旋来说大致相同，而且有人认为，同样的估计也应该适用于更高自旋的粒子，特别是引力粒子。如果膨胀能标度为10^{16}GeV$数量级，则丰度比通常的粒子碰撞机制的丰度大，但如果它低得多，则不是这样。
Particle creation during inflation is considered. It could be important for species whose interaction is of gravitational strength or weaker. A complete but economical formalism is given for spin-zero and spin-half particles, and the particle abundance is estimated on the assumption that the particle mass in the early universe is of order the Hubble parameter $H$. It is roughly the same for both spins, and it is argued that the same estimate should hold for higher spin particles in particular the gravitino. The abundance is bigger than that from the usual particle collision mechanism if the inflationary energy scale is of order $10^{16} GeV$, but not if it is much lower.