Opnening the window to the cogeneis with Affleck-Dine nechanisn in gravity mediat
Opnening the window to the cogeneis with Affleck-Dine nechanisn in gravity mediat
复制标题
打开阿弗莱克-丁在重力介质中的同生之窗
DOI：
10.1016/j.physletb.2013.01.017
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发表时间：
2013
影响因子：
4.4
通讯作者：
M
中科院分区：
文献类型：
--
作者：
Kamada;A. ;Kawasaki. M;. Yamada;M
观测到的重子密度和暗物质密度最大为5倍。这表明重子不对称性和暗物质具有相同的起源。在这方面，Affleck-Dine重生是最有前景的机制之一。Q球通常形成于与阿弗莱克-迪恩重生有关的早期宇宙，它既衰变为超对称粒子，也衰变为夸克。最近，有人指出，夸克湮没成夸克是Q球衰减率的主要贡献，Q球衰变成超对称粒子的分支比与先前的估计不同。在这封信中，从改进的Q球衰减率的角度，重新讨论了重力中介中Q球产生重子和暗物质的情景。结果发现，当质量为400-600GeV的WINO是暗物质时，成功的共生发生。
The observed baryon and dark matter densities are equal up to a factor of 5. This observation indicates that the baryon asymmetry and dark matter have the same origin. The Affleck–Dine baryogenesis is one of the most promising mechanisms in this context. Q balls, which are often formed in the early Universe associated with the Affleck–Dine baryogenesis, decay both into supersymmetric particles and into quarks. Recently, it was pointed out that annihilation of squarks into quarks gives a dominant contribution to the Q-ball decay rate and the branching ratio of Q-ball decay into supersymmetric particles changes from the previous estimate. In this Letter, the scenario of baryon and dark matter cogenesis from Q ball in gravity mediation is revisited in respect of the improved Q-ball decay rates. It is found that the successful cogenesis takes place when a wino with mass 400–600 GeV is dark matter.