Enhanced dark matter annihilation rate for positron and electron excesses from Q-ball decay.
Enhanced dark matter annihilation rate for positron and electron excesses from Q-ball decay.
复制标题
增强 Q 球衰变导致的正电子和电子过量的暗物质湮灭率。
DOI：
10.1103/physrevlett.103.151301
复制
发表时间：
2009
影响因子：
8.6
通讯作者：
McDonald J
中科院分区：
文献类型：
--
作者：
McDonald J
我们表明，当湮灭截面得到充分增强，以解释PAMELA、ATIC和PPB-BETS观察到的正电子和电子过剩时，阿弗莱克- dine重子发生模型中的球衰变可以解释暗物质。对于沿平面方向的Affleck-Dine重子发生，再加热温度约为30 GeV，球衰变温度在10-100 MeV之间。通过球衰变产生的最轻的超对称粒子湮灭到观测到的暗物质密度，如果横截面被一个相对于热遗迹横截面的因子增强。
We show that-ball decay in Affleck-Dine baryogenesis models can account for dark matter when the annihilation cross section is sufficiently enhanced to explain the positron and electron excesses observed by PAMELA, ATIC, and PPB-BETS. For Affleck-Dine baryogenesis along aflat direction, the reheating temperature is approximately 30 GeV and the-ball decay temperature is in the range of 10–100 MeV. The lightest supersymmetric particles produced by-ball decay annihilate down to the observed dark matter density if the cross section is enhanced by a factorrelative to the thermal relic cross section.