Dark matter production during the thermalization era
Dark matter production during the thermalization era
复制标题
热化时代暗物质的产生
DOI：
--
复制
发表时间：
2019
影响因子：
5.4
通讯作者：
Masaki Yamada
中科院分区：
文献类型：
--
作者：
K. Harigaya;K. Mukaida;Masaki Yamada
我们重新审视了膨胀后热化和再加热时期的非热暗物质（DM）产生。暴胀子的衰变产生高能粒子，这些粒子被热化以完成宇宙的再加热。在热化完成之前，DM可以由高能粒子和/或环境等离子体之间的碰撞产生。我们计算的DM丰度从这些过程中产生的DM生产的横截面的情况下，是成比例的质量中心能量的n次方。我们发现，高能粒子之间的碰撞几乎总是占主导地位的n <$4，而它是次主导的n <$2。当n ≥ 3且再加热温度为DM质量的量级或大于DM质量时，来自环境等离子体的产生占主导地位。从高能粒子和周围的等离子体之间的碰撞的生产是重要的n 2和再加热温度是远远低于DM质量。
A bstractWe revisit the non-thermal dark matter (DM) production during the thermalization and reheating era after inflation. The decay of inflaton produces high-energy particles that are thermalized to complete the reheating of the Universe. Before the thermalization is completed, DM can be produced from a collision between the high-energy particles and/or the ambient plasma. We calculate the DM abundance produced from these processes for the case where the cross section of the DM production is proportional to the n-th power of the center of mass energy. We find that the collision between the high-energy particles is almost always dominant for n ≳ 4 while it is subdominant for n≲2. The production from the ambient plasma is dominant when n≲3 and the reheating temperature is of the order of or larger than the DM mass. The production from a collision between the high-energy particle and the ambient plasma is important for n ≲ 2 and the reheating temperature is much lower than the DM mass.
GUZilla 暗物质
影响因子：
5.4
作者：
Harigaya, Keisuke;Lin, Tongyan;Lou, Hou Keong
通讯作者：
Lou, Hou Keong
来自改良的早期物质统治的非热暗物质
影响因子：
5
作者：
Allahverdi, Rouzbeh;Osiński, Jacek K.
通讯作者：
Osiński, Jacek K.