Q-ball decay through A-term in the gauge-mediated SUSY breaking scenario
Q-ball decay through A-term in the gauge-mediated SUSY breaking scenario
复制标题
在规范介导的 SUSY 破坏场景中，Q 球通过 A 项衰减
DOI：
10.1088/1475-7516/2020/04/017
复制
发表时间：
2020
影响因子：
6.4
通讯作者：
Nakatsuka Hiromasa
中科院分区：
文献类型：
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作者：
Kawasaki Masahiro;Nakatsuka Hiromasa
Q球是一类非拓扑孤子，其经典稳定性由整体U（1）荷保证。特别地，Q球是在阿弗莱克-戴恩重子生成的框架中产生的，其中U（1）电荷是重子数。由于某种类型的Q球对于量子衰变为核子是稳定的，因此它可以充当暗物质。当暗物质Q球被捕获到中子星星中时，它们吸收周围的中子并增长以消耗所有的中子，这导致对Q球暗物质的严格约束。然而，Q球增长由于U（1）打破A项而停止。我们重新考虑了中子星星对规范中介型和新型Q球的约束，并找到了Q球作为暗物质的允许参数空间。
Q-balls are non-topological solitons whose classical stability is ensured by a global U (1) charge. In particular, Q-balls are produced in the framework of the Affleck-Dine baryogenesis where U (1) charge is the baryon number. Since some type of Q-balls is stable against quantum decay into nucleons, it can work as the dark matter. When the dark matter Q-balls are captured into the neutron star, they absorb the surrounding neutrons and grow to consume all the neutrons, which leads to a stringent constraint on the Q-ball dark matter. However, the Q-ball growth stops due to the U (1) breaking A-term. We revisit the constraint by the neutron star for the gauge-mediation type and the new type Q-ball, and find the allowed parameter space, in which Q-balls work as the dark matter.