arXiv 1201.22002012-01hep-phastro-ph.COhep-th

阿弗莱克-戴恩动力学和泛生论的暗区

Affleck-Dine dynamics and the dark sector of pangenesis

Benedict von Harling, Kalliopi Petraki, Raymond R. Volkas

备注：: 51 pages, 7 figures; v2: minor modifications, comments and references added; v3: minor changes, matches published version
发表信息：: JCAP 05 (2012) 021
DOI：: 10.1088/1475-7516/2012/05/021

摘要：

泛生论是在重子对称宇宙中通过阿弗莱克-戴恩动力学共同产生可见物质和暗物质不对称的机制。重子对称性意味着暗物质的不对称性抵消了可见重子的不对称性，从而加强了可见物质和暗物质数密度之间的紧密关系。本文件的目的是更详细地分析这种情况的一般动态，并构建具体的模型。在回顾了支撑所有重子对称模型的简单对称结构之后，我们转向对所需的阿弗莱克-戴恩动力学的详细分析。考虑了引力介导和规范介导的超对称破缺，后者中信使标度是任意的，并确定了参数空间的可行区域。在规范介导的情况下，引力子是轻的和稳定的，他们构成的暗物质密度的一小部分制度被确定。我们讨论了Q球的形成，并描绘了各种制度的参数空间中的阿弗莱克-丁潜力相对于其稳定性或寿命和它们的衰变模式。我们概述了Q球的形成和衰变与成功的泛生作用是一致的地区。可行的暗扇区的例子，并来自大爆炸核合成，大尺度结构的形成和子弹团的限制。对撞机签名和直接暗物质探测实验的影响进行了简要讨论。以下是泛生论的证据：超对称性、GeV量级的暗物质质量和一个在暗区有着明显不可见宽度的Z'玻色子。

英文摘要：

Pangenesis is the mechanism for jointly producing the visible and dark matter asymmetries via Affleck-Dine dynamics in a baryon-symmetric universe. The baryon-symmetric feature means that the dark asymmetry cancels the visible baryon asymmetry and thus enforces a tight relationship between the visible and dark matter number densities. The purpose of this paper is to analyse the general dynamics of this scenario in more detail and to construct specific models. After reviewing the simple symmetry structure that underpins all baryon-symmetric models, we turn to a detailed analysis of the required Affleck-Dine dynamics. Both gravity-mediated and gauge-mediated supersymmetry breaking are considered, with the messenger scale left arbitrary in the latter, and the viable regions of parameter space are determined. In the gauge-mediated case where gravitinos are light and stable, the regime where they constitute a small fraction of the dark matter density is identified. We discuss the formation of Q-balls, and delineate various regimes in the parameter space of the Affleck-Dine potential with respect to their stability or lifetime and their decay modes. We outline the regions in which Q-ball formation and decay is consistent with successful pangenesis. Examples of viable dark sectors are presented, and constraints are derived from big bang nucleosynthesis, large scale structure formation and the Bullet cluster. Collider signatures and implications for direct dark matter detection experiments are briefly discussed. The following would constitute evidence for pangenesis: supersymmetry, GeV-scale dark matter mass(es) and a Z' boson with a significant invisible width into the dark sector.

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